I am assuming you mean that you don't know if you are pregnant or not but perhpas you weren't sure if you were having a period this month or not?
Have you missed a period? Take an over the counter pregnancy test. follow directions about timing..how many days out from expected date to test.
Your sypmtoms could suggest pregnacy. However you could also have a urinary tract infection. You might want to drink cranberry juice &/or get some mannitol (health food store)and add to water or juice this works great for bladder infection. Check with your doctor either way, if your symptoms continue, or if you have had them for more than a few days.