No judgement please.

So I am on birth control and have been on it for a year and a half now. I take it daily (never missed one) however the timing varies sometimes up to 3 hours of when I take them (if I sleep in or not). I had sex 7 days ago (he pulled out), and I am supposed to get my period in 10 days/is when my placebo pill week starts. However, 6 days after having sex and 10 days before my period I have brown discharge/and slight dark red/brown bleeding when I wipe. I’m terrified that this could be implantation bleeding, but I’m on birth control. I took a test (probably too early and it was negative). I am 24 years old, working 2 jobs and going to college. I am no way financially stable to have a child. If I end up being pregnant I have to go to planned parenthood and will be getting the abortion pills. Please do not judge me... I just am wondering how much it will cost to pay for the abortion pill? 😞