When I started this I got some really good advice:
Don't ask people who don't run a business for advice on how to run your business.
They have NO idea. Even my mom thought I was charging too much until she saw all the work I did. Now, she is like "did you charge?" and fussed at me for doing my cousin's bday cake for free!
Anywhoo, I don't think you are charging enough. I think you should be up to $5 per cookie, still cheaper than cookies by design I believe and I bet yours are a lot tastier!
Those cookies are awesome, I hope to be that good someday.
Let the family stuff roll off your shoulders, easier said than done I know. I am finally at the point where folks and their opinions and issues don't bother me so much any more. It took a while to get here though.
Glad you do have some good support though, this road ain't easy!