super confused?

okay so my periods are always regular, and I mean always. I was due for my regular monthly period of March 22nd. a week before, I started what I thought was implantation bleeding because it was unlike any of my other periods. it was light and lasted 3 days and I wasn't even bleeding fully every day. it would be for like 3 hours and then it would stop and start the next morning. usually my periods are super heavy, and I have horrible cramps, and it's consistent for 5 days. I tested every other day after that for 2 weeks, and they were all negative. however I've been having super sensitive nipples, I've been moody as hell, hungry non stop, and craving things I've never craved before. this never happens before my period. so my question is, is it possible i skipped a period, but still ovulated, and I'm pregnant? should I test maybe? my actual period hasn't come yet. it's due April 22nd then if we're going by months. should I wait until after that day if I still haven't started? I'm sorry for the long post.