I was a college prof for years and I really liked it when students approached me for help. I'd sit in my office during office hours and feel like I was being useless, sometimes! Besides, if you end up on the border of two grades at the end of the term, I'd likely give you the higher grade, knowing you were trying.

Also, do you know anyone in the classes who seems to be getting the material? Maybe you can work out a plan where you can seek their help.

I really admire you for taking on so much. Gee. Amazing!