Pelvic pain

Alyssa
Hi ladies. So I was taking a nap on my couch and woke up to go to the bathroom. As soon as I went to the bathroom I started having severe pain on my left side. It went from my pubic bone up to my left hip and then up into my ribs and my back. My right hip has some pain but not nearly as bad. It's so bad I think I might throw up. It's a lot better than it was initially, but what would cause this? Is this just round ligament pain?? I'm 20 weeks today.