lately I've been feeling that my stomach is so cramped up, likes theres no more room. that I can…

lately I've been feeling that my stomach is so cramped up, likes theres no more room. that I can literally be sitting down on the couch and I'm out of breathe. it feels like my lungs have no space anymore. it's really been affecting my sleep, ugh. is this normal this early? I'll be 19 weeks tomorrow.