I would visit a doctor as soon as possible because unprotected anal sex can be very harmful to your body. Make sure you eat healthy foods meanwhile and only eat three times a day so you don't get as sick. Cramping but no period could just be irregular but the other symptoms aren't very normal
Hi, I'm not a doctor, but I have lots of friends in the medical profession, and they strongly warn me against anal sex. It can cause permanent damage in your rectum to the point where you can no longer control your bowels. A nurse-friend of mine has actually had to send several people home in diapers
if you had unprotected sex there is a chance you could be pregnant...take another test if your period hasnt shown within the next few days.