Pain at the end of peeing

Rebecca

So I noticed from last night that everytime I pee as I finish peeing there is this little pain that like is coming from my vagina as I finish pee. I dont know why. I've been peeing frequently and I've stopped drinking water but still peeing.

I noticed that my right boob has gotten bigger in the past few hours. My lower back has been paining today too. Any idea why?

Tomorrow I'll go to a doctor but just wanted to have an idea what could be going on