Three days ago I had intercourse with my fiancé. We used protection but stopped after a while. I m not on the pill or on any meds. Two days after intercourse, I went to use the restroom. I was urinating fine; until after 10-15mins later I had the feeling of constantly needing to use the restroom. I would urinate but very little. After 4-5 times of doing that, I used the restroom again and it was burning. There was no odor or anything. The symptoms I had were only pelvic pain, burns when urinating (very little), and very little droplet of blood. What can this possibly be? Is it an infection?