19 weeks today just left the emergency room. was cramping really bad and couldn't hold anything down…

19 weeks today just left the emergency room. was cramping really bad and couldn't hold anything down at all.. was really dehydrated. they pumped me full of fluids and did sonogram just to check on lil man make sure everything is good. he's great. heartbeat is 139... The tech asked me if I was sure I'm 19 weeks N in said ya I'm due Aug 8 why? and of course i started freaking out asking if baby is okay he smiles at me N says ya baby is fine.. he's measuring 20 weeks 2 days!!! lol I have a feeling imma have a big baby this time!