Could Frequent Urination With Itching Be Due To UTI?

1) I am a sexually active 26 year old female with one partner only. I have researched and it seems I have a UTI. I go to the washroom to urinate way too often...maybe 8 times a day. It's been happening for about over a week now. How can I treat this condition myself? It feels irritated and tingly most of the day down there but I do not have any blood discharge in my urine nor do I have cramps or any pain anywhere else. I do feel a mini burning sensation, but briefly...while urinating. I want to see my family doctor to seek medical options but I am uncomfortable speaking to him as he is a male. 2) I do not use protection during sex as my partner pulls out in time. I feel VERY uncomfortable if my family doctor tells me I'm pregnant when tested using my urine sample - is it possible to determine pregnancy when asked to be diagnosed for a UTI?