Help? Weight gain!!!

Hi guys. So I was on Celexa for anxiety and panic disorder from February to September and during that time I gained 10 lbs (not due to lifestyle). I have NOT been able to lose this 10lbs since stopping taking it in September. Usually I am a fit 125-130lbs but I have lost so much self confidence since ballooning up to 140!!!

About me: 23 years old. Eat 1/2 cup oatmeal with berries every morning for breakfast, smoothie or nourish bowl for lunch, something healthy for dinner (usually 1/2 veg, 1/4 protein, 1/4 crabs)... Fruit for snacks. Exercise at gym, walk dogs, and don't drive so lots of walking.

How do I shake the weight?!! Should I stop eating what I am eating and just eat salad for a while? I am at my wits end with this 10 pounds that just won't go away.

Please tell me if you've had a similar experience and what you did to get rid of it.. I am just so sad now!