Re: 20 year old with erection issues
All these symptoms could result from the infection it sounds like you probably have. An infection pretty much anywhere in the urogenital system can cause these problems. The increased urge to urinate is a good sign it's a UTI. The doctor will diagnose you and probably give you an antibiotic or anti-fungal.
For future prevention, you might find cranberry helps a lot. It has components that prevent bacteria from adhering to the urinary tract. Cranberry might also help keep the infection from getting worse before your doctor appt. if that's not for some days. If it is a UTI and it gets more advanced, it will burn when you urinate.
Infections like this can be sexually acquired (including from oral), but it could also just happen for no good reason, so it's nothing to be ashamed of.