Got my AEMT. Starting to go crazy

Been in EMS, mostly IFT for three years. Have picked up 911 very seldom as I have two kids and a wife and all that and I never wanted to make work out to be more than them. Spent nearly a year getting my AEMT and when it came down to do upgraded third rides after getting my new license I have been choking on simple things during calls. Not flowing fast enough or stumbling when being asked questions by my training officers while trying to give patient care. I feel like a failure and do not know where to go from here besides riding out my contract until it's up at the end of this year to try another service.