Could I be pregnant?

Hey ladies, my husband and I aren’t trying, but we aren’t 100% preventing either, so here’s the deal. I had a period a week and a half-2 weeks ago. Was somewhat normal? The last two days were much lighter than they normally are, but it was still a period. I have been INSANELY tired and irritable and my boobs have been tingling, not so much hurting but definitely tingling. I have been super busy at work this week so I contributed the tiredness to that, but is really been going on longer than just since Tuesday-Friday at work. I’ve also been very short and snappy with everyone. Yesterday I felt like I had started my period again which was very weird for me because my periods are very regular (not on BC). I had not started, but I had spotted some bright pink/red blood. I was nauseous every time I ate over the weekend and occasionally thoughout the week but I really don’t think it’s possible bc we did not do the deed around the right time (according to my tracker app) either month and I just feel like I will have a gut feeling when I am pregnant. What do you guys think?!