Been sick with a fever every night.. help

So long story short I was drinking loaded teas 3 days straight and the caffeine made blood pressure so high as well as heart rate constantly high. Well now my blood pressure is back perfect, heart rate still high.. I went to the dr they said it was because of the loaded teas.I was light headed and having hot flashes for about 3 days after that. A few days later, I am constipated and had to take something for it, but I’m still not regular, just a lot of gas. It feels like I CAN go, but nothing comes out. Then on top of it, I’ve been running low grade fevers at night(100.0-101.0) with hot flashes. I feel fine during the day. Anyone know what this could be?