Don't worry too much about it.
I had a back fusion 4 years ago, and it took about a year or more to finally feel better.
I had numbness in my leg like you did, I also couldn't stand, sit, sleep, have sex, do laundry....basically ANYTHING would hurt, and bad! I went to see over a dozen doctors, surgeons, physical therapists, etc. I also tried everything under the sun to take care of it, nothing worked. I finally was referred to a neurosurgeon who gave me the fusion, and now I surf, jet ski, skateboard, you name it.....
If you did have a fusion, give it some time (I was EXACTLY the same as you, I wanted it to be better right away, and thought it never would, but one day you'll wake up and say "hey, I can't even remember the last time my back hurt"
And as a side note....I WOULD NOT BY ANY CIRCUMSTANCES GO TO STEEL RATS DOCTOR!!!!!
I went to the site to look at it, as I am always interested in alternatives to fusion (although it's too late for me) and I noticed where the doctor is located, and who he is...
Dr Chiu fucked my Dad up BAD!!! and was an asshole about it to boot.
My dad had a waterskiing accident and had to have pins in his hip, where they stayed for about 15 years until his hip joint deteriorated to the point where he needed a hip jiont replacement. Dr Chiu did it. Well less than a year later my dad was complaining of serious pain, instead of admitting there might be a problem, he told him it was OK and gave him pain pills for another year. Well after the pain pills tore his stoamch up for a year, he decided to have another doctor look at it since good ole Dr Chiu wouldn't admit anything was wrong. Turns out the god damn hip joint was loose, and had been FOR AN ENTIRE YEAR!!!! So my dad had to live in extreme pain cuz this asshole wouldn't listen to him.
Should have sued his malpractice ass!!!!!