Implantation bleeding?! Scared. Please help.

Hi! Sorry if this question gets asked a million and one times, but I'm 18, a week away from college, and stressed out. I have a full, $100,000 ride to college and I have always been super dedicated to my future. But I had unprotected sex with my boyfriend a few times 1-2 days before I ovulated.

I've had a ton of what I thought was pms symptoms, and crazy blue veins running up and down my breasts, thighs, shoulders, and pelvis.

Last week, 9Dpo and 4 days before af, I got spotting. Warning: TMI!!!

I have NEVER spotted before a period, or at least I haven't noticed. Two days later, on Saturday, I had light brownish red spotting.

I did take a pregnancy test on Sunday, 3 days after the spotting began, and it was negative.

Tonight, after I missed my period, I got even more bright pink spotting that lasted a few minutes. Today would be 13 Dpo.

Warning: TMI!!!

What do I do? Should I wait a few more days until I get my period? Or is THIS my period? Implantation bleeding?! I'm so confused and extremely scared.

Again, I'm new to this board despite having used glow for a while now. I appreciate any insight or advice y'all can offer me. Thank you so much in advance. ❤️❤️❤️

Update: I started my period today! I'm extremely grateful and have learned a big lesson from this. Thank you.