Can laying under a blanket in a hot room cause a fever

No, a fever infects your body when the virus gets into you. Overheating doesn't give you a fever, but having your body weak and exposed to germs may very easily get one.

Just make sure to stay hydrated if you are probably going to be sweating a lot :)

My teacher was in one when she was in high school. these abusive lovers can ruin you. mentally and physically. my teacher got a black eye once. she wasn’t able to attend parties or even her moms birthday party all because her bday wanted her to himself.