if you all the sudden loose feel of the club head, check grip pressure. so you play great then once you grip it too hard, which may cause lose of feel, and hit a bad shot, you get more tense and grip harder. That is just a stab at it. also, if you are lunging towards the ball, then that does not allow the left shoulder to snap back, which shoots the club down, that shooting down feeling is a feel also. Those are possibilities. Get yourself on camera at least, or find a good pro