A classic story. A pony goes to a bar. A pony gets drunk. Said pony gets laid. She gets pregnant. Her best friend/roommate finds out and their relationship is nearly destroyed. Then something happens to Bon Bon that makes them lose their house (for good this time), but their friendship gets repaired. Simple stuff really. Oh, and somepony goes on an insane acid trip.
While selecting the main cast, I have realized the shortage of male unicorns. Whats up with that?
Please note that I was really tired and couldn't think straight while writing this story. Enjoy.
Chapters (6)
Hmmm, Spell and Grammar check could help here a little.
Why in Celestia's creamy white plot is there a bed in a bar? 
I would have expected something like a hotel room for Lyra to wake up in after leaving the bar with Mr. Big 'n' Red, probably with the colt already gone when she comes around. 
Your drunkenese wasn't bad, and when it got really hard to understand you did an excellent job of providing a translator in the bartender. Very good there. 
O/A this seems very shallow though, I understand from the Teen tag your not going for clop here, but some emotional 'gut dump' to bring out the motives and character of Lyra and Bon-Bon would certainly help. 
It would really help especially when Lyra goes to the 'door' with Big 'n' Red to further her plot line (pun wholly intended here). 
You've got the drunkenese, but missed the POV beer-goggles effect to address why Lyra would just go into a convenient bedroom in a bar and get herself plowed. 
The second chapter, sorry to say, is more of a footnote to the first with a conversion added.
Now get back on your horse and keep going.
So it's been 6 months since she had sex and got pregnant, but this is the first time she noticed that she didn't have her period? Maybe you should change it to one month.
2895116
OK, I did not understand half of that.
Please start speaking English. 
But drunkenese? (FWI I used that in the story now, hope you don't mind!) Clever
2895154
Like the description said, I was really tired and couldn't think straight.
2895592
English?
Well, I guess you mean as opposed to academic right? 
Okay. Simplified version.
Why in Celestia's creamy white plot is there a bed in a bar?
Why not have them 'do the deed' at a hotel? Most bars I've been to don't have beds in the mop closet or such.
I understand you probably used the 'Teen' tag as you didn't mean to describe 'the deed' (ie write clop)
. But you could have expanded on Lyra's thoughts and emotions about why she trotted off with Big Mac and got knocked up. 
Did she find him unusually attractive at that moment? Alcohol for most beings impedes judgement and lowers inhibitions causing individuals to do things they normally would not consider doing. (Like having unprotected sexual relations with some pony who walks up to them in a bar and says 'Jew gwana po' out of the blue.) 
2895687
Well, thank you for dumbing it down so I could understand XD.
No clue about the bed thing, don't question my sleep deprived mind.
Same answer.
That wasn't the closet.
Shes drunk, she can't think, those are her thoughts.
Quite possibly.
Yes?
You sir should keep writing.
I want to read more.
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You have my sympathies and envy for being able to pull that much story out of a sleep deprived brain. 
Sleep deprivation, I totally understand now.
2899054
I don't need your sympathies, I live with it, my non sleep deprived brain is practically the same way.
Well I can understand that you weren't in the best condition writing this, so saying anything about it might come off as mean. The only thing that bothered me is that you the author seem to interrupt the story a lot and have moments of just skipping ahead or lazy writing (Which makes sense since you were tired.) I would be glad to read your work when you were more awake. If this sounds mean at all I don't mean it that way.
2899826
I was just sitting here with a perfect response in my head, but I can't figure out how to word it. So I'll just say this. Ahfiashgaiufhuadgfiuasigdsiuvbus.
Well said...
Uh I think?