Hi. I have been trouble losing weight due to water retention.
So do you have edema or something?  Have you gone to a doctor?
No, I have not gone to the doctor, but I am planing to do so soon.
I went to a bariatric medicine place that deals with weight loss, I bet they could help diagnose something like that. You could also take a diuretic
That sounds like a great idea. 
Have you tried any other lifestyle changes for managing your weight?