Pelvic pressure: Is this normal/ okay?

eb6

I feel pelvic pressure when I pee. Not always, but especially if my bladder is really full. I'm 19 weeks and it kind of aches when I push the pee out. Once I stand up I feel a little ache like my pelvis is readjusting and after a few minutes I feel no pain anymore. Should I be worried about this? Is there anything I can do in order to make this stop? It especially happens when I wait to pee.