I am in a similar situation.
Been flat for the last 3 months, with some ups and downs there. Can't seem to get pass my peak winnings. Would have a string of strong sessions in a row, only to have a bad day and lose 3 or 4 buy ins.
My prob's tilting and getting too aggressive. I still get my money in there ahead most of the time, but at maybe 2:1 or 1.5:1 instead of higher odds
of holding up. And when things go bad they go downhill for me.
Knowing the prob is one thing, fixing it is another.