Braxton hicks at 29 weeks?

I am 29 weeks and woke up this morning with a headache and ate breakfast. After breakfast I started feeling hot and nauseous and thought maybe it was just a usual side effect of pregnancy. After a few more minutes I started with slight loose stools and what I described at the time as a stomach ache. After a little bit longer the stomach ache continued and came and went. I've had on and off "cramping" and when it happens I can feel my stomach get tight and sort of feel pressure and some type of pain. I called my doctor and she just told me to rest and drink fluids which I have done all day. I still am having the feelings on and off but seems to be further apart. Not sure what else to do at the this point. Anyone else experience this?