Can my marriage be annulled due to mental health impairment.

In March of 2011 my house burned down (due to an electrical problem in the front wall) and my son of nearly 11 months died and according to the Fire Marshall it was a miracle that I survived. We were the only two home. My son's father was currently living elsewhere as we had separated again. Emotionally crushed with grief and myself experiencing symptoms of PTSD, the father and I reunited and both decided that we would get married on what would have been our son's first birthday in April a month after the fire and loss. We married in St. Thomas, VI. We permanently reside in Pennsylvania. This marriage is not going well for us and would not have happened had we not suffered the loss of our son. Are we eligible for an Annulment?