Birth Control and weight gain... 5+ years or more on some RX

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Ok, sorry to automatically weed out the under 5 year people but let me be clear. I've been on birth control for 13 years now. Of those 13 years I've been on NuvaRing for at least 5. I was looking for other women that have been on the same birth control method for 5 or more years so I can get some insight on the weight gain. I know every woman's body is dfferent but I am begining to think that being on the ring for this long has actually caused a little weight gain or at least not helped me lose any weight.
Here's some facts about me to help you out:
36 yrs old
NuvaRing for 5 years; no side effects ever
Current weight: 180
Weight at time of starting ring: approx. 150
The only major events that had occurred during my use of the ring is my Father had passed away unexpedectly 2 years ago. I did gain about 15 # just from that, stress took over my life.

I want to maybe change methods but I like the ease of use of the ring. I know my age has a bit to do with weight gain/loss and my metabolism.
Just wondering what others have experienced.
Thanks!