need help john deere 3300 combine

[3wracing]

Hello I have a mind bogaling problem and its starting to get the best of me. I ve been combineing oats and beoke a drive chain no big deal. Well now I have a problem that it won't take the oats abd stalks into the throaght of the combine it just piles up and when it does decide to go it locjs the gathering chain up at the head. It only comes in a foot bb ir sobif that it justnlocks up.ecerything els keeps running but the gathering chain. Keep in mind ive ran it for how many days and its ran perfect. I don't se anyrhing broke and am very confused any thoughts?

 

[AGRIMAN]

Are you sure it's piling up at the feeder house or could it be bunching up along the head and moving to the feeder house?

You didn't happen to loosen a slip clutch and forget to tighten it back.