can any one help me

hi, 4 years ago i had an operation while in theater there was a power cut and all other operations were canceled for the day. from that day every thing about me has changed, im very forgetfull, always tired ,i dont even look the same anymore. i feel like i havent woke up properly since. a week after my op i was rushed to a+e with stroke like simptoms after a week and all sorts of scans they told me i did not have a stroke and that i had 3 spots on my frontal loab but they were not causing my simptoms and they dont know what caused them. i have been in and out of hospital several times since and have never been diagnosed.i was wondering could i have suffered a loss of oxygen when the power cut happened? could that be causing my simptoms.