SOS!! UTI?

Okay, so. It happens at least once per cycle and sometimes happens only one day and sometimes I happens upwards to a week at a time (and especially after exercising) But after I️ urinate, I get this severe burning sensation. Like the only way for it to go away is if I sit down and just let it pass (usually takes 5-10 mins)

It doesn’t burn DURING urination, only afterwards. I’m turning 20 next Tuesday, never been to an OB/GYN (never had sex)

Thoughts ?