Third trimester sex.

yes. sex. my husband doesn't want to have sex with me because I struggle too orgasm. it is so sweet of him to want that for me, but It's hard finding and staying in a comfortable position. even with me on top, my stomach will start to cramp as I get close to finishing... :( but I still love to be intimate, and I still want to be desired. even if only he finishes, I'm ok with that! I've told him this over and over! I've looked up different positions, but I can really only orgasm with me on top. (I can't even finish with oral) ladies, help! I don't want to have a dry spell for the next 8 weeks, then another 6 weeks after that :( what are your favorite/go to positions?