Serious Issues

[SecretShopper123]

Alright.
It all started when I was 4. I complained to my mom I was having painful urination, this led to my first UTI diagnosis.
I have had at least 2 a year since then. It has gotten to the point where when I go to the doctor and complain about painful urination they tell me I have a UTI, put me on meds and for a while it seems to get better.
But each time I go in it gets worse and worse.
Im now 19 and have been having serious issues and symptoms..
First off I have had a recurring ache  below my belly button above my actual genital area, internally. This is coupled with random stabbing pains when I sit up, set down, or am sitting.
Secondly I have noticed my bladder has become extremely weak, I find it hard to make it to the bathroom sometimes, even if I haven't drank recently. I also have actually peed my pants before, even when I didn't have to go, it just came out without question, this usually happens after showering. Sometimes, not always, I have experienced feeling like I am going to pee my pants even though I have just used the bathroom.
All of the symptoms above have become more noticeable more so in this past year although painful urination has been an issue I have dealt with since a young age.
Now that I'm older I'm not as embarrassed as I am frustrated, and have been actively trying to figure out what I have been dealing with my entire life. I have an appointment in April to see a Urologist, but I fear things might go wrong and they may not be able to figure out what this is.
I would really love to have something to go on and bring up to the doctor so if anyone sees this and has lived it or knows what it may be, even if it is just a suggestion please comment.
I have been dealing with this my ENTIRE life so it would be nice to hear from someone who understands!
Thank you!