Weight gain due to birth control

I've been on birth control pills for 4 years. I started to gain weight over time I went to 130 to 180Lbs I've worked out cut out sugar sodas and red meats fish the whole nine yards I did meal replacements nothing worked for me I made sure it wasn't a medical issue I was cleared of anything serious. They said my birth control being a high dosage will cause heavy weight gain. Should I get off this birth control. (In mind this is the only birth control I can afford) what should I do?