I don't like this feeling.

This is going to be weird, and i would like real answers for this from ONLY GIRLS.

Ok, so I'v heard of UTI and such STDS blah blah.

But sometimes it burns "downthere" a lot, sometimes even during sex.. but not all the time. sometimes i go a day without it burning. or week.. but its been quite often. also it leaks.. sometimes a lot. and i have been more sexually active with a partner and just myself and i think this may be the cause of it. and i really dont think an std is an option at all. iv talked to my doctor and he says uti. gave me some meds for it a while back.. and it didnt happen for a long time. but its starting back up again. could this just be from me being too sexually active?