Bloating and cramps after during the entire cycle

Dear Doctors, 3 months ago I had a D&C at 12 weeks after the fetus stopped developing at week 8. I got my first period after 5 weeks and it was a normal period. Since then I started taking baby aspirin for blood clothing problem that my doctor discovered. We have been trying to have a baby since then but with no luck. The only thing that bothers me is that since the period after the D&C I constantly have cramps and feel bloated just like during period or during pregnancy. My doctor performed an ultrasound and couldn't find any problem. Any idea what could be causing this bloating and cramps throughout the cycle and does it affect my chance of getting pregnant again? I was pregnant 3 times before and always became pregnant during the first cycle.Thank you

One option is ENDOMETRIOSIS, and also other non-gyn problems. Dr. Avishalom Sharon