Hi Sweetpea.
That is great that you have finished the medical diploma program!You are on a roll now! Find out from whatever undergrad college you plan to attend, what you need to do to get accepted. Ask if any those courses (like math, science or english)will transfer. Fill out the application. Pay the application fee. Have the medical program send your transcript over. You may have to write an appeal letter stating why you should be admitted to the school, ask the admissions office. Since you have done very well in the medical program, you most likely will probably be accepted. Most likely when you are accepted, you will be taking the core courses first like math, english, history, science, sociology etc. Don't overload your schedule. Maybe just start off taking one to two courses, no more than three whatever your schedule allows. If you have any problems in any of your courses (you probably won't since it sounds like you are a very smart person), find out if there is free tutoring available or get with other classmates in the courses to study with. Its great you are married to wonderful man that treats you right and is supportive.
Let me give you a quick short testimony. Failed twice in college

. After so much frustration and failure, I stopped for 15 years

. I went back in 1998 with a low, very low, bottom of the barrel GPA

!. Wrote an appeal letter to get in and wrote an appeal letter for financial aid too! :) . Graduated from Georgia State University in May 2000 with BA in Speech Communications and a minor in Sociology :) . Currently working on my Masters degree online at Capella University. Hope to be finished by the summer

.
I know you can do this. Just find out what you need to do. Take it from a older woman of wisdom, it is possible. All things are possible with God!