Sudden symptoms- can anyone offer advice?

Jessica
I'm 16 weeks today, so far I've had no morning sickness but...
-been constipated for a day or so now 
-been feeling very full and uncomfortable (due to constipation)
-woke up this morning pretty puffy in the face, hands, and even my forearm had a big print from my ponytail holder 
-woke up with bad headache 
-finally I threw up about 5 times. But it was mostly just water 
-feeling a little better but still need to go #2 badly!!
Do these symptoms add up to something bad? Anyone experience similar symptoms?
This was my first time throwing up since being preggo!
Thanks