Heart palpitations

Hi I was wondering what I should I do. I had pre-eclampsia during labor about 7 months ago. I'm starting to have heart palpitations and chest pains, I also feel like my right arm is tingling. I feel fine other then that. Where I live, we are having a bad heat wave so I just feel like it's the heat but I don't know what to do. I'm 25 years old and this is all new. It's 12:41 am