Chain feels loose in highest sprocket/small front ring
I just took apart my crankset and rear derailleur and gave it a whole cleaning and re-greased everything - it really needed that!! Everything ran smoothly other than misplacing a few pieces a couple times. But now when I shift into my small ring at the front, all of the sprockets in the cog work fine except for the highest gear (smallest sprocket). The chain feels tight like it should in the other gears but as soon as it goes down in the highest one, it feels like the chain just droops down. It actually touches the bottom of my front derailleur and if I pedal slowly it gets all jammed up. I tried adjusting everything but nothing seems to work. It also skips gears quite a bit when shifting and has a really hard time shifting into the smallest sprocket too.
Sorry if my terminology is off or all over the place, I'm not good at this stuff, if you need me to reword anything ill be happy to edit, thanks!