Self Studying A Levels?

I was supposed to start my AS Levels in September 2014, but got depressed to the point where I had to drop out because I was missing too many lessons. September 2015 I chose few different subjects at a new College, but I've realized I made the wrong choice and it's too late to change. On top of that, I've started binge/purging again and it's always brought on by worrying about going out to school.

I want to self study because:
1) I don't want to have to wait another year to start at yet another college and be behind by two years,
2) There are no more colleges accessible to my area that provide the combination of subjects I want to do,
3) From other threads I have read, the most difficult part is staying motivated enough to study. Which I know for sure I can do.

Some more information about my situation:
- The subjects I chose this year were English Language, Computer Science, Art and Film Studies. I dropped Art because I realized how much I hated it despite getting an A* at GCSE. It was too late to choose another subject to replace it so I carried on with my remaining three subjects. It feels like I was distracting myself with the mindset of "oh I just need get this over with" and so it took me a while to realize that I wasn't interested in Film Studies and wanted to drop that too.
- The subjects I would like to self study are Computer Science, English Language and Sociology. I feel like this wouldn't be too much to take on with one term having already passed because I've already got enough information on all of them to carry on (including Sociology, as despite not choosing it this year, it was a subject I studied half at my old college up until March 2015. I also still have ALL of my notes/revision notes from Sociology, my revision books and on top of that my uncle is an A Level Sociology teacher.)

Other threads on here talk about how Universities love students who have demonstrated that they can self-teach independently and successfully. However my mother keeps saying that if I self study then I can't go to University and I'll ruin my life.

So what I would really like to know is if Universities really do 'frown upon' students who drop out of college to self study, and if they would be more understanding of it if I could highlight to them how it was due to personal problems. Not having the social advantage of school could put them off, but if I got a job at some point maybe that could help to make up for it? Also, who could I get a reference from?

Thanks x