new mom syndrome

i admit it. ever since major pulled his ligament in feb. i have had the new mom syndrome...bad. i've been a nervous wreck about if i am doing the right things to make him better and i constantly worry about his legs. well today i decided to let major loose in the indoor arena which he hasn't been able to do since he got hurt. in fact he hasn't even gotten turn out (but that will change shortly cuz there is a small, dry, and flat paddock he will start being turned out in). well i lead him into the arena and i slowly unclipped the lead line while my heart was thumping wildly in my chest. he turned and started to walk away and sniff the ground. a minute passed and i started to relax but then pookieman exploded. he took off bucking and i freaked out. he took about four laps around the arena when i stopped him and snapped the leadline back onto his halter. i felt horrible but seeing him take off like that scared the crap out of me and the only thing i was thinking was that he was going to pull something again. i immediantly took him outside and trotted him on the hard ground to check for lameness but there wasn't any. i swear i am going crazy. i am always second guessing myself and i can't help but remembering that day when i found out that he had hurt himself. god i'm going crazy.