What Causes Irregular Periods While On Reclipsen?

I have been on the birth control reclipsen for 4 years now and haven t had many problems with it. About once a year though, I would just completely skip my period, then I would get my period the next month and carry on like normal. Well two months ago I missed my period and I took a test and it said negative, so I thought this one just one of those times. Well I didn t get my period this month, and I took another test and it still said negative. I don t have anyone in my family that has had this problem. But I have changed my diet and work out habits, and I ve been under a lot of stress. I had the symptoms of my period including cramps, but it didn t fully come. I m very irritable, I ve gained 10 pounds in 3 months (that s a lot of a small 5 2 girl), my boobs feel bigger and are tender, and I feel depressed all the time. Are you able to tell me what s going on?