Congratulations!!! Way to go.
Your story reminded me of the first deer I took with my .54 caliber Renegade. I pulled the trigger and a cloud of smoke circled me and I was sure I missed. So I sat there, smoked a cigarette (yes I used to be a heavy smoker) and kept beating myself up for rushing the shot. Then decided .... I better go look. And like you walked over to where I was sure the deer was and there it lay. I think that was the best venison I ever ate that year. I relished every bite.
Congratulations again and enjoy your harvest.