Trying to conceive

Hello everyone! I have 2 kids an trying to get pregnant with my 3rd for 4 months now I had my merina birth control surgecly removed 4 months ago after having it in 8 months it got pushed up far so they had to dilate me to remove it they told me it could take 3 months or 3 periods to get pregnant again I'm now waiting for my 4th period sense then but I've been having period type cramping in my lower stomach an lower back off an on for the past 3 days but my period isn't due for 11 days could i be pregnant?