Is it all worth it?

I'd like to know if these feelings of self-doubt are normal. I'm not sure what else I can do to attract people to my book. I'm sending a copy to Borders because apparently they stock self-published books, but I'm so down I'm convinced they'll take one look and think it's crap. I am also worried because they haven't send my order for Two Become One. Lulu can be a bit rubbish at getting back to you and I'm worried that I've wasted ten quid.

I've done 5 CD Roms for distribution around Oxfam shops, but I'm so cheesed off and down on myself I'm convinced they won't even want my freebies.

Perhaps I should just go back to writing as a hobby.