Just don't feel right..

Im 37 weeks and Yesterday it started with some low constant cramping and stabbing pains on the lower right side of my stomach, then after I went to bed I had heavy chest pain and a hard time breathing. I woke up with upper right thigh pain and tingling and couldn't fall back asleep.

Today, I had to go to walmart bright and early. I went and just walking into the building from parking I had to sit down. My heart was beating out of my chest and I couldn't breath. I took a little break and got going. By the time I was done and got back to the car, my chest was hurting I couldn't breath and my heart was beating so hard and fast. I got home, went up the stairs and immediately got lightheaded and saw glitter like spots floating around.

I thought maybe I'm just tired. So laid in bed for an hour and I just couldnt shake any of it and on top of everything, now I was getting crazy hot.

So I got up and checked my blood pressure and it was normal (129/79) but my heart rate even after just laying for the last hour was 125. I called my doc's nurse and told her about the cramping and the extreme exhaustion and all she said was drink water and relax..

I'm really struggling. I can't breath and nothing is helping...everytime I call the nurse line they say "drink water" and obviously I have..also baby is moving okay.

Anyone have any ideas on how to get relief? Or what the problem could be?