What should I do ?!?

Since thanksgiving day which was last Thursday I’ve been having bad stomach cramps so I tried sleeping them off for a couple of days but it just got worse it had gotten to the point when my whole body feels sore , my cramps have spread to my lower abdomen to the very top of my stomach under my breasts and also to my back now into the point where my body is very sore and I can’t seem to keep anything down all I’ve been drinking throughout my pregnancy is water and I can’t even seem to keep that down now, I honestly don’t know what could be wrong but I’m 20 weeks pregnant exactly and I just need answers on what I should probably do