Baby anxiety

Hi! So just want a second opinion before I go buying a test. I went to see my long distance boyfriend in November, you can guess everything else that happened there. When I got home I had a lot of symptoms that made me think I may or may not have been pregnant. Anyway, I got my ‘period’ and it was a little heavier than usual, so I thought that was the reason why I was sensitive to smells and my boobs were so sore, I couldn’t wear a bra. it lasted 2 days before turning to dry blood. So that was that, and today, about a week early, I have got some form of bleeding, it was spotting last night, then this morning passed a sort of clot and now I’m barely bleeding at all. So, should I be concerned about being pregnant or am I just overthinking it?

Thanks guys 😩