9 days late HELP!!!

I'm s wreck because I have no idea what is going on with my body. Last month my cycle was 5 days late giving me a 33 day cycle this month I'm at 39 days & still no cycle. I doubt I'm pregnant my hubby was away & we had sex 3 days before my last period. Has this happened to anyone?? We're TTC a so I've been off the pill for 2 months. Monday I was  having really sharp stretching pains on my left side took a OPK to see if it was ovulation but that came back negative so I think it may have been a cyst.