Sex while pregnant

Okay ladies ... So, clearly, this is my first pregnancy lol I am 5 1/2 months pregnant and have a belly the size of a volley ball and sex is starting to get a bit "difficult" .. I get tired and my legs hurt when I get on top and my husband is scared of "squishing" me lol .. Any suggestions on what we can do that you found/find to be more comfortable? Any suggestions would be great!!! Thank you 😃