thanks everyone

Cramps in legs especially while sleeping is due to poor circulation. Please ensure you drink enough water and do some calf and ankle exercises during the day. Back pain is due to posture as well as sleeping position. Support your abdomen with a wedge pillow and also have a pillow for between your legs.

this is common minaxi. try to keep hot compress. and keep some pillows and prop ur legs up. it might relieve pain and swelling if any.

These pains are common during pregnancy... increase your fluid intake.... that will help