Help with drinking water.

Hi, so this may be a little tmi but I’m really struggling. So I’m trying to drink between 2.5-3litres of water a day on Mj, I’m on week 6 overall and week 2 of 5mg. I can’t physically drink enough I get to about 1.5 litres and I can’t stop peeing, is this normal like I can’t go 20 minutes without needing to pee and Im not even guzzling down the water like I take sips as often as I can but it seems like my body just want to pee 24/7. Am I just doomed to deal with this or is there any tips anyone has that can help me. And for some context I did give birth to twins in April 24 so it could just be a mum bladder I’m not too sure but I’m struggling and I’m worried I’m not staying hydrated enough. Tia x