Omg plz help!

So lately I have had the feeling of not being able to pee it doesn’t burn or anything I just dnt feel the sensation to go even though after drinking a gallon of water I know I have to.

Wel I’m on my period or so what I think it is . It has been very very light

Looks pink and hasn’t ever been dark red.

Now I’m experiencing pain in my lower left abdomen and it is painful! It feels just like a dull pain.

Idk if it’s happeneing because of the uti meds? Or could I be pregnant ???

The pain is also shooting down my thigh

Plz help it hurts!!!