Bloated, hard stomach for 3 weeks after last cycle, nausea, dizzy spells. what can cause this? she is under a lot of chronic stress too.

Gastritis/gallbladde: You should be checked for irritation in your gastrointestinal tract, specifically your stomach and gallbladder. The bloating is due to gas: often peope with stress involintarily hypersecrete acid and bile as well as "gulp in" air or hyperventilate. No matter what these conditions should be evaluated with examination and blood testing.

Get going: Hard swollen abdomen requires medical attention immediately. This is not a stress problem until serious conditions are ruled out.