Lots of pressure

I’m 25 weeks today and today is probably one of the hardest days Iv has yet being pregnant. I just felt my baby kick me the hardest Iv ever felt a few times in a row and it took me by surprise and now he’s putting a lot of pressure down there and my backs starting to hurt what should I do drink water and lay on my side ? I just feel like cramps down there sorta or it’s pressure I can’t tell it just feels like how it was if I’m about to start my period