Why do I have a fever after foreplay? We did not have sex.

So you take your temp after foreplay, or are you merely feeling hot

No, I just woke the next morning and I did not feel good and I was burning up, so I took my temp.

Unless you got an infection or some STD, will have nothing to do with it what so ever.

I don't have either. Thank you

Unless you were checked by the doctor, sorry you can't be sure, infections can come from various lubes and different types of foreplay,

But perhaps concern and stress over the foreplay, or you were just catching a cold?

The two don't have anything to do with one another. Most likely you are just getting sick and it has nothing to do with the foreplay.