Groin pain, blood clot/normal?

I'm 25 weeks and we recently drove to our in-laws that live 8 hours away. I noticed before we left their house my lady bits have gotten pretty swolen. I've read that its normal for that to happen. But my groin especially on my left side by my bikini line feels like I over worked a muscle. It hurts about a 5 when I stand up and normally goes away once I get moving. Is this normal.