Thanks for the query to ATD for an opinion,
The typical symptoms of pain while urination and lower abdominal pain after frequent sex last indicates that you have contracted a urinary tract infection. This shall cause even urgency and lower back ache and often fever with increased frequency of urine as well. It is suggested that you should visit your physician and get a urinalysis done to isolate the causative organism.
This infection shall require a course of antibiotics for 7 days in all to treat the infection completely. It is also suggested that you increase your water intake to 5 litres a day to allow flushing out the infection sooner.
Please visit your physician for a prescription of antibiotics soon.
Wishing you speedy recovery,
Hope i have answered your query,
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.