posting the TMI pic again, no one replied.PLEASE GIVE ME YOUR THOUGHTS

I posted this way earlier and had almost 100 views but no response. I'm on birth control, and have been for 7 months. I take it the same time everyday. I have 4 placebo pills left until my reminder pills start. I should get my period in about 7 days. My boyfriend and I had unprotected sex four days ago and I just started getting this weird discharge yesterday night. I know it's too early to even consider pregnancy. But we had unprotected sex during my last period. My last period had a lot of brow spotting in it. My periods are usually very light but I don't get spotting until my reminder pills start. I'm Also having cramps, bloating/gas. My mom said it's just spotting but it's mucusy brown. Is it just possibly I'm freaking out over nothing, and it's my period? I've had no pregnancy symptoms during this whole month.