I don't want to say anything horrible here that will make you feel worse, but I suffered with wrong ended morning sickness alongside nausea until around 11 weeks at which point it became several days of constipation followed by an urgent trip to the loo. Since around 15 weeks I've just been constipated so now I complain at the other end of the scale!
Hopefully it won't last that long for you, I have some digestive issues anyway so that may have added to my bodies distress at all the hormones and whatnot.
Good luck, I hope you feel better soon!
xx