i was doing the quest with that guy in the caves or whatever where you have to help people to get tokens to unlock the doors..one of the things was go and drink the potion in the alice in wonderland place again and i cant for the life of me figure out how to get my character to its normal size again... ive been stuck mini for like over a month lol

That one's a lot easier to undo then getting the Brain Slug off your head.
For this one all you need to do is to go to the Rabbit Hole and finish that simple quest, perhaps a hundred or less bushes.

There must be a quest in there that you have failed to turn in or failed to complete. Check your quest log. There are many quests in that land, and later on there also is a repeatable one Size Does Matter where you have to get 10 things.
Or open the Map, turn on 'show active quests', hover your mouse over the name of any unfamiliar quest, go to that highlighted square.
Or go to the strange room and click in the table or the bottle on the table.

perhaps you have a cache or flash memory corruption, so clear it all and load the game again.