Wow, what a story. So glad you were able to pull through. My $.02 for you:
1. You learned your lesson the hard way. Get vaccinated as soon as your doctor will allow;
2. 5'11" 220 is not a "a little overweight". That is a LOT overweight. Probably 40ish pounds overweight. As soon as you are able, fix your diet and start a cardio/weight training regimen. You can run with nothing but a pair of shorts and tennis shoes and build from there. Start slow. Couch to 5k like program and build yourself into shape.
3. Most importantly. Nurture and grow your relationship with Jesus Christ. Number's 1 and 2 above are just friendly worldly advice that won't matter for anything 40-50 years from now. This one will make a difference forever. Read your Bible daily. Get you a daily devotional and do that each day as well. Spend time each day with just you and the Lord praying, reading the Word and just sitting. Doesn't have to be an hour, but make some time. You are obviously home for a while. Make use of it and build this relationship now. Get more involved at church. Join a small group of young couples your age. Volunteer, serve, get involved with mentors that can steer you along. Go to Amazon and purchase, Spiritual Disciplines for the Christian Life by Donald Whitney. It will change your life.