Its normal take a 15mins or 30mins walk and eat healthy yup be fine
I had it sooo bad with my first pregnancy. This pregnancy I have been drinking more than double the amount of water and I have only had 2 cramps (I'm 34 weeks) So staying hydrated works!!
Also try taking a short 30 min walk during the day... You can also extend your leg, point your heel down, and curl your toes up a few times while it's actually hurting you in bed. It does help. I suffer from the crap sometimes and it does suck :(
I know your pain!! Stay hydrated and eat plenty of banana's.