You are not stupid! You are so far from stupid it's not funny. You've done amazing things and have overcome amazing odds. It might feel overwhelmingly but with your determination you can do it. Remember you don't have to get an A in every class. Stick it out as long as possible in your web class so next time you take it you'll be familiar with the course. The option to use your step father's death is just that, a valid option, it doesn't mean you failed.