Weight Gain With Anti-depressants

Hi!
So I have been putting on weight over the last few months, it started about 2-3 months after I started on anti-depressants. I am really worried that I will keep putting on more weight if I don't stop the meds. In addition to that I am binging on food, but I am sure I did not put on 7-8 kgs only by eating more.
I was searching about this online and found a video where a guy says weight gain with depression meds cannot be reversed. Is that true?

Any advice from people who have been on anti-depressants?

I took Nexito 20 mg for 8 months.
I am currently on Sertraline 50mg twice a day since 2 weeks.
I am also on Clonazepam 0.50 twice a day.

 

Yes, I understand that weight gain is common with anti depressants, what I am seeking to know is-
Will the weight gain be permanant?
Will exercise and healthy dieting work while Im on the medication?

 

I understand that I need to talk to someone and I am working on it. I have recently changed my Psychiatrist and my meds have been changed too. The doc asked me to wait for a month before beginning counselling.

I have never been the kind of person who would set goals and stick to them. Even when I was studying, I would make many time tables to be followed to prepare for exams but was not very successful in achieving it completely.
When it comes to weight loss I have a strong will to lose weight but I am fighting against Depression and it's making things harder.
Everytime I workout it is an achievement for me, bcoz only I know what it takes for me to get up from the bed, put on my shoes and get on the treadmill. I think someone who is going through depression will understand this.
But everytime I do that, it makes the next time a bit more easier. I workout atleast once in 2 or 3 days, sometimes I workout continously for 3-4 days at a strech.
I am dieting too, but I lose my control when my mood dips and I start binging on food. I end up feeling guilty.