I've had cramps on and off my entire pregnancy even the last one. Putting a warn patch on my back helps and warm showers or baths
Heat/ice applied to your back, exercise, and better posture. Those helped me back in the beginning and now that I'm 37 weeks, the cramps have returned.
i had cramps during first trim and not the second but now im in third trim and they came back
i find taking warm showers helps relax. dehydration causes cramps so make sure your drinking enough water.