Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
and your sexual contact probably doesn't have any relation. Its just co-incidental that you started having fever around the sex time. The only distant possibility is that of honeymoon pilitis wherein you have urinary tract infection
when you have sex cause of tear or contamination. So its better if you get a urine test done. Otherwise do take paracetamol
to take care of your fever and body aches.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.