Round ligament pain

I get some pretty intense round ligament pain while walking. I'm told I should not have that type of pain, but I do nonetheless. I dont have a traditional belly at all. I'm 28 weeks pregnant and just look fatter than I was before I got pregnant I'm currently 376 lbs. I've only gained 10lbs but want some relief. I was told a maternity belt would be helpful, but my belly doesn't stick out so how would it help? Any ideas or advice? Basically laying on my back at night is the best relief I can get at this point.