Definitely see your doctor.. It sounds like a uti. The last time I had a uti and didn't get it treated on time it ended up being really painful and causes kidney stones! That's the last thing you want during pregnancy
Go to your dr as soon as you can they can run a test to make sure its not a UTI. If it goes untreated it could cause other problems. They will probably give you macrobid its an antibiotic that's safe for pregnancy.
Well you may have a uti, when is your appt.? Drink cranberry juice just in case