Anti-Depressants v.s Thyroid Medication?

I have been on antidepressants for a few years now. Recently Bupropion XL (Wellbutrin) is the medication my physicians put me on. I have been experiencing some unusual issues recently, including irregular periods, fatigue, exhaustion, the list goes on and on. I was diagnosed with Hypothyroidism today and was given a natural thyroid supplement to take daily. I am wondering if anyone who has experienced the same thing has continued to stay on the antidepressants since depression is a symptom of thyroid issues? Wouldn't the natural thyroid bring your TSH level down to a normal level and relieve this? Any advice, thoughts,etc would be appreciated.