I need you guys advice ❤️

Good morning lovely ladies, I have a serious question and I am scared to test because I seriously don't want to see a negative sign. So long story short me and my boyfriend had sex a little after my period which was the 13th of August. On the 22nd of August I threw up when I made it to class which was around 8:00 a.m.. Now let's fast forward to September. My period came 9 days later than when it was suppose to show up.. I was suppose to start the 8th of September and started on the 17th of September instead..But it came and was normal so I didn't think anything of it. Now October I skipped my period COMPLETELY. Nothing at all. And this is unusual for me. I've never skipped a period at all. Does this sound like I could be pregnant or did anyone else experience something similar? Thanks for reading and I would appreciate any advice and responses ❤️