totally normal. my approximate healing timeline went something like this
1 month out i felt like a human again. i could be out and about all day, my chest wasn't sore anymore, except for a 1" square area where the incisions nearly meet in the center of my chest
3-4 months out, all numbness went away
1 year out, my chest felt totally normal. all tissue had adhered, all scars softened and faded out.