Feeling off..

Last Wednesday 5/15 in the morning I was in the shower in the morning and all the sudden I felt like I was going to pass out my body got very weak and I got really hot.. then 2 days later (friday) 5/17 we were in the car on the way home and all the sudden I got really hot, dizzy, Blurry vision, my arms started to hurt and I just felt like I was going to pass out it lasted about 5-10 minutes.. and ever since then I still don't feel right I just feel off.. I'm 27 weeks and 3 days pregnant anyone else go threw this? What could it be.