13 Week Kitten still Hissing and Hiding

First time cat owner. I have had my 13 week old Abyssinian for 11 days now. 

I knew he was going to be stressed, scared, and shy at first and he didn't eat, drink, or pee for almost 48 hours.  I'm sure it didn't help that the morning after I had picked him up we went to the vet for a check-up which probably scared him even more.  He now loves his litter box, food, and water even though it took him some time to figure out how to not tip over the bowl :). 

I didn't come into the situation blind and knew that you need to let the cat come to you.  He has been in my bedroom with his toys and everything else (I have been sleeping on the couch to avoid further stress).  I feed him 3 times a day and keep the dish near me and a hiding place for him as I sit in the corner of the room quietly.  He is very comfortable with this after our 11 days together and will come right after I have sat down but will hiss then move on to his food.  After he eats I use a wand toy to play with him and he gets pretty excited over play time now. 

Here is the issue.  He still won’t let me near him.  He will come up and sniff me but I would have to be sitting for nearly an hour quietly in the same spot for him to even attempt this.  When hes playing with his wand he gets very close even sliding into my legs at times but as soon as he sees my face he hisses and runs away (I try to avoid direct eye contact during play as people have said that is cat language for confrontation).  I give him treats that I place in my hand.  He will hiss as I extend my arm closer to him but then investigates my hand and takes the treat. 

I understand this can take some time but does anyone else have any tips?  Spending 4-5 hours a day just sitting quietly in a corner of a room for 11 days without much feedback or change in the cats behavior is getting pretty tiring.

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