Yep, you took a beating. Been there, done that and have two t-shirts.
But, it will get better and with the grafting, let it heal 3 months and then talk to the Perio about the implant. Go for it. You will be glad you did later on. Think about the upper arch and how number 14 will react to the loss of 19.
Implant will take about an hour. Same sedation and Novocain. He will most likely open gums to the area, drill to depth of implant (most likely a shorty or medium cause of the big nerve down in the mandible), install implant, sew up gums and heal for another 3 months. You will probably won't be as sore as the tooth extraction.
After healed, Perio will give a shot or two of Novocain so he can cut gum away at top of implant so as to install the abutment. Then it is off to your regular dentist to get impression for crown fitting. Two weeks later the crown is installed and your done.
Time frame will allow you to spread out the expense.
I got 3 implants and am glad I did. So will you.
I'll see if I can get the pictures my Perio took during my procedure and post them.