Smaller partners .

I had been with my ex for 6 years & to me our sex was great & his dick was big, he would always hit my cervix. I had intercourses with someone else & I didn’t feel anything but the pressure of the dick going in & out !!!! I don’t know if it was because he wore a condom ? I feel like my ex left me loose ? Anything I could do to help with the situation ? I just don’t seem to feel anything unlike my ex I would feel it when he would slid it in.