Night sweats

Hello everyone does anyone experience saturating night sweats that last all night until about 8 in the morning,I have my heating off and every top window open,spoke to GP as we know it’s not hormonal these are as if you have just got out of the shower and never dry the sweats come up on every pour plus I have lymph nodes above my collar bone I’ve been to the head and neck clinic but came home with no answers just ultra sound down one side but the swellings are in both sides abover the cavular and the exhaustion is so debilitating.Please help