Dizzy when I leave the house, tired, and sweating at night. What's causing this?

Last night was the worst! I was sweating and could not sleep at all last night. The thermostat was set to 77 with fan on, big fan was on and I was sweating bullets. Been getting dizzy and feeling weird every time I leave my place as well. Not sure if I got my period or what the light pink spotting was almost a month ago. I'm worried I have a disease cause if I didn't get my period it's now 46 days late and I took a test couple weeks ago and it was negative