First time pregnancy 19 weeks

Yesterday I had a discomfort feeling under my stomach like mild gas I wasnt to concerned it wasnt really bothering me

Today the feeling is there alot more along with a annoying pain it doesn't really hurt it's more of a annoying hurt it feels like I need to fart but it won't come out. I've taken a warm shower it seemed to feel better in there I've been out for about 10 min and the feelings are slowly coming back.

What should I do to relieve the gas or does anyone know if this is something more then gas

Please and thank you.