At two months post concussion, Second Impact Syndrome is very unlikely. Are you having any headaches ? Second Impact Syndrome is when the brain is still struggling to control blood pressure to the brain. This can least to excessive cranial pressure that can have serious risks.

I would still recommend you stay away from contact sports for at least 6 months. Multiple Impact Syndrome is not deadly but it can sure make a mess out of the rest of your life.

My best to you.