Cancer survivor needs weight loss motivation

I am a 36yr old woman who has been in complete remission from leukemia for almost 7 years and have been struggling to lose the weight I gained from chemo treatment (50+). I went into the hospital Aug. 13, 2003 weighing 146 and lost 15lbs during my 1st treatment which lasted 3 weeks. By the time I finished all of my treatments (In-patient treatment and oral chemo) in Jan. 2006 I weighed approximately 186lbs. I had been active my whole life between playing sports, running around with my toddlers at the time, and just on the go in general. The lack of not being able to be active and never knowing if or when I would get sick from the chemo I ate as much as I could at any given time led to the significant weight loss.

Now over 9 years later since my diagnosis I weigh 162lbs and have tried almost every diet (South Beach, No Carb, Gluten Free etc) and still struggle to lose the last 20lbs. I was also recently diagnosed with stomach and intestinal issues those arose from the chemo and can no longer eat any type of meat without becoming sick immediately afterwards. I am now limited to only seafood which did not sound bad in the beginning but has become a bit difficult lately.

Just looking for support and motivation to help me lose those last 20 pounds please... Whether or not you are a cancer survivor I would really appreciate the help :)

My goal is to lose at least 5lbs by the end of the year and the whole 20lbs by my birthday in March :)

HELP HELP HELP!!!