Pregnancy phobia

So I have a lot of anxiety when in comes to pregnancy. I have never been pregnant, I am only 21. On the New Years Eve I went out partying with my friends, and I had a little bit more alcohol than I should have. I didn’t black out, but some parts of the night, mostly detail, are fuzzy. I had been sexually assaulted 2 years ago, while I was unconscious so I have anxiety about blacking out. Since New Years Eve, I have been constantly worried about being pregnant, cause I keep imagining this scenario in my head with me having sexual relationships with someone in the bathroom at the restaurant I was at. I ve been imagining it so much that it feels real now. I constantly asked my friend if I did something even tho I know I didn’t, and they reassured me I didn’t, but I just can’t stop worrying. I had my period that month( January) and I am on my period now. I did around 10 pregnancy tests which were negative, but some of them had indent lines or some lines appearing after the time window of the test, so that freaked me out too:) and also, I read forums about how women get their period or bleeding like a period while they are pregnant so that scares me, cause I don’t know if this is a period or something else. Now my question is, would a pregnancy test be a clear positive at this time? I mean it has been 8 weeks or so since then. Should I keep doing tests? I didn’t do a blood test cause the idea kinda gives me more anxiety, and I don’t know if I am going crazy but it feels like it. Do you guys think this is my period or something else? I mean it came on time, a day or so late. I don’t think bleeding during pregnancy comes at the time you re period is supposed to come. I just need some peace of mind cause i am going broke buying all these tests and I have been worrying so much that it takes up my entire day, and it affects my physical health too. Thank you.