This isn't a strategy post as per say, more of a mental game query, but for years I have been unable to follow my gut and find the fold button when I'm behind. Its not in common situations like folding top pair with a medium strength kicker when a flush hits (I have no problem folding there) but its in spots where its very tough for the opponent to have a hand, yet its obvious they have that hand, and I level myself into calling. I've tried all sorts of approaches, from laid back reflection to aggressively berating myself, but nothing seems to solve this problem. Admittedly it rears its ugly head more when I've already suffered a few bad beats and coolers (and generally these spots tend to come up when in a downswing, so its a bit of a vicious circle), but that shouldn't be an excuse.

Does anyone have any advice on how to get rid of this beast once and for all as it really destroys my winrate when its in full flow.