Utterly confused...

After my D&C (also got laproscopy and dye test which right tube was blocked)in May the month after I was regular 28 days n since then has been 34 days. I'm on day 36 tomorrow will be CD 37. My boob's are soar n the only different thing is on day 20 I had cramps. (I ruled off as late ovulation maybe?) Has anyone gone thru why my cycle keeps changing? I also haven't taken a pg test. I think it's just the cycle is messed up.