the burning and bleeding during urination is more likely fom a uti
I think there's a little change physically during the first month of pregnancy if you're already pregnant, like your breast and hips are getting bigger. I'm not sure if you're already pregnant now, just wait for your menstruation these month to know if you're really pregnant.
There's not much you can do except to wait until your period is due and take a pregnancy test. I know it's hard but that's the only way to know for sure.
As for the burning, it's possible you have a bladder infection. Take the pregnancy test first and if it's negative get seen for possible infection. In the mean time try drinking cranberry juice as that's supposed to help with bladder infections, just in case that's what it is.
Good luck!