30 weeks pregnant and having bad cramps!!

I need some help I got woken up at half 4 am with the most sharpening cramps ever and couldn't get back to sleep till 6!:( woke up at half 7 and decided to have a bath cause pains were still there... That didn't help and now I have had the cramps all day and not seeming to go what should I do? He's moving loads so not worried about him but this pain is starting to get annoying and won't go away..:(