Forgiven, of course! I've forgotten divine capitalization at times myself... Lightning hasn't struck yet. :) God is forgiving of much more serious sins than proper English usage. I think you're safe.
Short-term memory loss is indeed a very frustrating pain. I've acquired a bit of that myself of late, but mine's more due to turning 60, and the accumulated damage done by long-ago youthful indiscretions, than as a result of accident. I will pray that God relieves him of that infliction, and for success in his college studies. My own daughter just entered Univ. of Hawaii to major in Comp. Sci. so I'll be doing a lot of praying the next few years! :)