Ah sayang, this is actually quite common in the third trimester! Your body is preparing for labour, so everything down there is softer and more sensitive, plus baby's head pressing on nerves and ligaments can make things uncomfortable or even painful during intimacy. A few of us tried just taking it slow, using more lubricant, or switching positions that feel less pressure on the bump, and honestly it helped! The good news is that being intimate won't cause your water to break or anything scary like that, baby's pretty well protected in there. But since you're worried and it's causing you real discomfort, best to check with your gynae, they can advise what's safe for your specific situation and might give you tips that work better for you both.