Any advice?

I woke up at 3:30 am last night with severe cramps and cold sweats. I was soaked with sweat and shivering. I was nauseous and dry heaved for about 20 minutes. After about a half hour the cramps and nausea subsided and this morning I feel completely fine. I have no cramps and I wasn’t spotting. Anyone know what could have happened? I was so scared something terrible was going to happen. I’m 6weeks and 1 day along. Thank you everyone in advanced or any advice!