Anxiety? Or something else?

Jojo

So I woke up in sweat. Really hot. And racing heart out of my chest. This has never happened to me before. The doctors say everything is anxiety but I don’t feel the same. I have a past of anxiety. I do not take meds. Any opinions? I am 10 months post partum and still nursing. I am currently on my period. It just came back 3 months ago. This is my 3rd one. Possibly could this be hormones? I have been really hot off and on for days