Period and plan B

Hi, how are you?

So let me explain and then maybe you lovely ladies will be able to help...

So i had sex on the 6th of Feb. I only was able to go get the plan B on the 8th because i had no car so for me to get to the shops was an issue. Also i know you can drink it up to 5 days but at least i got mine in less than 48 hours (i did actually count the hours). My period was supposed to only start on the 27th of feb, but for some reason it started on the 15th which was Monday. So i know the plan b pill can either delay your period or make it come sooner... But isn't this to soon?

Thats not the only question i have so please continue reading and please just explain why this is happening..

So when it started on Monday it wasn't like any normal period i have had. It started of as brown but only when i wiped. It can almost fill a tampon but doesn't go onto a pad at all.. Then Tuesday it wasn't just brown but started to get a little reddish color with it. And still doesn't fill a pad but each time i wipe there is sort of a lot on the toilet paper. So Wednesday it was red and filled a tampon but yet again not a pad.

Today is Thursday and it is totally gone.

Please tell me what's going on.

And also reason for me taking the morning after instead of just my normal birth control is that i was on antibiotics the week before i had sex. My antibiotics course ended on the 5th of feb and i know antibiotics cancels out the birth control. But since it was 2 days after my antibiotics course ended that i had sex and almost 2 days after i had sex took the plan b. So still hoping that it worked but i did take 2 plan b a couple hours apart.

So don't be rude and ask me "why you not on birth control if you don't want kids" or "you not educated on how this works you shouldn't be having sex" because you don't know me and i just now explained everything in the best way possible. Keep your rude comments to yourself... Thank you

So i ask please try and explain in the best way possible why this is happening.