Retirement tax questions

I am in this same situation. I had no idea that I had any other income. Will this omission affect my refund as it is? I am aware that I will have to file an amendment, but should I still receive my refund as scheduled? Once I receive my refund I am understanding that is when I will file my amendment correct? This whole situation is new and confuses me. I would like to actually have someone to discuss this with, but all that seems to be available is the forum.