I have a long story I will try to make short so I was diagnosed with (PCOS) last year witch makes me have the irregular period. I am healthy but seriously over weight for my age I'll be 25 on the 27 this Month. i currently weight 285 pounds i was 320 but I talked to my doctor about help with loosing weight to get my pcos under control and he put me on a medicine called phentermine and I've lost 30 pounds in 2 months also had my period every two weeks this app glow said i should have got my period 2 days ago but I have not. I think because of the amount of blood losses in the past 2 months has caused it to slow down. but I have been sexually active since my last period 3 weeks ago. I'm not sure what it could be