My period was 9 days late on Thursday late night I was spotting Friday when I woke up I had something that looked like period yesterday it slowed down and today am barely having a flow I went to go use the bathroom and noticed blood dropping I period usually last 6-7 days 3 days of heavy flow 2 days of mild flow and the last day it stops I don't understand what's going on am I pregnant?

It's impossible to know if:
You are pregnant
You were pregnant and had a very early miscarriage
You aren't pregnant and just had an unusual cycle

Only time will tell. You can start home testing in about 2 weeks, but they can be negative for a while, so you may need several. If you don't want to get pregnant - I hope you are considering the pill or patch.