HELP please

I'm 32 w and 5 days with my 3rd pregnancy. My 2 other pregnancies I had some complications. My first I had gestational diabetes, my last one I ended up with preeclampsia. I'm trying to figure out what is going on. My last appointment I told my doctor about all the pain I've been having in my lower back and hips. Along with my stomach cramping up and it taking awhile to ease. Now today I have been burning up all day to the point I have been sweating, the heat I feel also makes it feel like it's hard to breathe and I'm feeling like there is so much pressure in my stomach like it's ready to explode. I've also been having issues with my cafs and shins hurting to where it hurts to walk and dying of thurst.......any ideas????