For last 3 months, ive been getting my period every 39-42 days. todays day 42 & no period, but have cramps. went to gyno a week ago & he took blood. test say not preg, but he said that im not ovulating from stress. can i fix this? i want my period!!!

Avoid stress: Stress is one of the major cause women misses her period but there are other causes too. So start by managing stress and let see how you are doing after that. Check this links. http://www.skillsyouneed.com/ps/avoiding-stress.html http://www.healthline.com/health/stress-prevention#Overview1

Annovulation: Anovulatory cycles are not uncommon for young women with usually normal periods. These episodes are due to sudden hormonal changes, possibly due to recent illness, stress, weight changes, and certain meds. Given normal labs, and fact you are on Lexapro, (escitalopram) stress is likely cause, assuming you have not been exercising excessively or lost a lot of weight. Try exercise and relaxation techniques - yoga.