Could I be pregnant? Paranoid af

Hey people, so I think I last had sex Halloween so was that like 3 months ago I think we used a condom and pull out. My period did come on time in November and lasted 5 days of heavy/medium bleeding. But I’m December it was 4ish to 5 days late and I hope it was stress it still had clots etc.. and January it was lighter but still had small clots and I had pro long brown bleeding after it and ended up lasting more than 5 days. Am I worrying for no reason ???