I'm 19w 6 days today and I have not stopped throwing everything up yet. Back and chest pain come with the vomiting sadly :( I also agree that there is a nasty virus all over the place! But there are only about three things I can eat right now--none of which are healthy to eat consistently but my baby is growing well and I'm being monitored by my doc closely and go on iv meds and fluids once a week/two weeks... If it persists, definitely talk to the doc! But as far as I can tell, sometimes the changing hormones are just too much for a body and that's how it shows you. Sick mommy can mean healthy baby though!
It kinda sounds like you have the nasty virus that's going around.
How long did you have it for?
I had non stop "morning sickness" with my 1st pregnancy... Never had the diarreha, but the chest and back pain are common with the constant vommiting, I even cracked a rib because the force behind it was so much, : ( I deffinately feel your pain... Hope it doesnt last much longer but if it does there are medications avail to subside the nausea