Wow, thank you for writing this. I have just begun freelancing (though I do have a part time flesh and blood job) and I really needed to read this! I'm already feeling some of the feelings you have now. The insecurity, the loneliness, the lack of mentorship/community that is colleagues. I miss water cooler talk!
I also applaud your honesty around Prozac. There is so much stigma around medication, and I get it, for a lot of people, it does more harm than good. But meds have been a godsend to my OCD. When something works for you, own it! Thank you for writing this!