What's going on??

I'm totally confused. Normally I'm pretty regular but my last and current cycles have been weird. My period in Feb on the 17th, then I was late in March (never that late) and wound up getting AF (i think) on March 22nd but it was light spotting (red) all week long. Not normal. I chalked it up to having been sick at the beginning of the month and things would get back on track this month, in April. MMC says I should have gotten AF on the 18th....but here I am on CD 31 or 32 and still waiting. The oddest thing is about this cycle is, I just recently noticed I have had NO PMS whatsoever, which I always do, the sore bb's, tired, crabbt,etc. I should have O'ed on Apr 5th or so (DH and i were active that week) but i'm not sure, Ive had lots of repeated little what felt like O pains here and there on diff days. Just lots of little twinges and weird feelings/pains. I've had some small bouts of nausea but nothing consistant or bad. Also Where did my PMS go this month? Some months my pms isn't too bad but it's always there and never just doesnt arrive like this. Is it possible maybe I didn't O this month? I've never had this happen and like I said I have had what i thought were O pains so I thought I did. Still waiting to see if AF shows in a couple more days. Anyone have this happen and just be having a weird cycle and not preggo? I know some women say they thought the month they had tons of symptoms and weren't pregnant, only to find out they WERE the month they didnt have any symtoms! I'm so confused!!