[Broken135i]

Hey im new here, iv had my 2011 135i (23000kms) for about a month now- in the past few days iv been pushing coolant past my rad cap (i went to bmw today, replaced the cap) topped it up and bled it- still pushing coolant when i drive it hard (aka long full throttle pulls in 4th and 5th) im at a loss. No CEL or overheating warnings, just pressurizing the cooling system :s

I fear my headgasket is toast :/ no milkshake in the oil or oil beads in the coolant :s

PLEASE HELP ME ITS MY ONLY CAR AND JUST BOUGHT IT WITH 23000kms for $23000 ??