For the past few days, I've been having to pee every 10-15 minutes. I know that's normal during pregnancy, but starting today it starts to hurt and I feel extreme pressure right when I'm about to pee. Whenever I go to pee, it hurts a little, not burning wise but it feels like It's irritated. Everytime I've been to the OB they tell me I don't have a UTI or any other kind of infection. Is this normal? & what can I do to ease these symptoms.