Do you ladies think the reason I am not pregnant yet is because of my weight? Last time I weighed I was 280-285. That was a while ago though. I am 20 and 5'7". We have been trying a year or more. I no longer have periods. Now 5 months without one. I use to be regular and all tests are negative. Never been on any birth control. When I went to the doc in April he tested my blood and said all tests came back normal.