What's happening down there?!?!

This is my fourth pregnancy but my first boy! One kind of big difference that I have noticed is the size of my lady parts. This is embarrassing to share, but I just have to know. Is anyone else's vagina bigger? It seems swollen but it has doubled in size. I'm now 21 weeks, and with my previous pregnancies this didn't happen until the last month. Also do you have any recommendations on what could help this? My sex drive is strong but my husband has difficulties getting into the mood while I'm pregnant, and this is not helping the situation 😫