Sex During Pregnancy

Hi mommies. How does your sex life w/ your partner goes during pregnancy? As for me, I'm 18 weeks pregnant and sex for me is a little painful but bearable. OB advised me not to have sex yet bec of I have a high risk pregnancy. Kaso minsan hubby can't take it and naaawa din nmn ako sknya so we do it. Mahapdi lng sya after and he said that it felt like namamaga ang loob ko. Any suggestions or advise? What was your experience during this stage of pregnancy?