TMI- vagina after sex- has this happened to you??

I'm 21 weeks exactly today and my husband and I had sex this morning. After DTD I walked to the bathroom to have a shower and noticed my inner labia was soo swollen that they protruded past my outer labia and basically held them open. They so swollen they were hard to the touch (but didn't hurt). It took a good hour for them to go back to normal... I couldn't even close my legs or sit..