Have I got UTI or not?

It first started about a month ago, I was having trouble peeing and when I did it hurt like a pressure feeling a little while after... I had a feeling it was uti but its really embarrassing for me because I live in a small town where all the nurses and doctors know me :/ and I've been having sex which I don't want my mum to know... Anyway, it felt as though it went away on its own for a while but now I'm waking up at the early hours of the morning and peeing lots of small amounts, but it doesn't hurt. I pee and I feel relieved until I lie down to go to sleep then I need to go again... What is this??? And how do I get rid of it???