Forever hot

Im literally sitting at my desk in the middle of winter in a cotton tshirt where i usually wear 3 layers of tops including a woolen jumper. Ive noticed the last maybe 4ish days ive just been boiling doing basic things let alone gym. Geezzz. On top of that, ive been feeling butterflys in my tummy and on the odd occassion nauseas. Last night i almost threw up while i peed for the 2nd time in the night. I ovulated on monday and had sex on 20, 22 and 24 and 25 i going nuts or could something be brewing?