Could I be pregnant?

OKAY, so my last period was January 21st, I have a 26 day cycle, and usually ovulate on CD 11 or 12 . So basically I should have ovulated January 1st or 2nd. Every month, when I ovulate, I get so achy I have to usually take some motrin and lay down. It feels like a stabbing pain in which ever ovary I'm ovulating from. This month, NOTHING. I know that sometimes it's normal to just not ovulate, but something is telling me that something isn't right. Just a gut feeling. I'm almost not wondering if I may have got pregnant last month when I ovulated, and had on Jan 21st what I thought to be a normal period, it was heavy, and lasted 4-5 days, completely normal for me. But is this possible? I mean, I've heard of people having "periods" through their whole pregnancy...course it's not an actual period, but some type of bleeding that occurs every how ever many days on a normal schedule. Weird, but I hear it's possible. I'm just curious as to what some of you may think. The main reason this was brought to my attention that I could be pregnant, is the fact that I have had REALLY sore nipples the past 4 or 5 days, tmi but my husband goes to grab and it just hurts...bad. I barely bumpp them and I'm saying "ouch!" orrrr...could it be just hormonal imbalance from not ovulationg this month? UGH! So confusing...please help!!?