Android 2.3.4

i am new to the forum, so i am not sure if this is wher it should be, but ever since i installed the 2.3.4 software onto my xperia arc, its become, excuse the language, ****ED! it keeps auto restarting itself, it wont recognize my micro SD card anymore, i even wiped my card, and tried to reformat it but it keeps glitching up and wont format it, my screen just randomly shuts off but yet it think its on, like i can see the LED turn on between the buttons on the bottom of my phone to tell me when my screen is on but yet the screen remains black, i really need to know if reverting it to 2.3.3 will help this, because my xperia arc never once had a battery problem. please help someone, i am about ready to snap my phone in half!