I have started taking strong medication for nausea and now a week later i am constipated and bad cramps and laxatives are bearing little results,please advise?

You don't mention what medication you're taking. Has that degree of nausea been evaluated and explained by a gastroenterologist? If you're currently having urges for a BM but can't go, you'll have to work from below by inserting a dulcolax rectal suppository or fleets enema. Sometimes manual disimpaction of stool has to be performed by a health professional. Discuss this with your gastroenterologi