As everyone else has weighed in, it's perfectly normal to doubt yourself. My husband is sick of reminding me that yes, I can write and I will be published someday. (he's probably also sick of me thinking he's just telling me that because he loves me.)
Seriously though, as everyone else said so much more eloquently, doubt is okay as long as you allow it to encourage you to work harder instead of allowing it to shut you down entirely. It has the potential to go either way and only you can make the decision as to where you let it take you.
That said, 8 agents who want to read your manuscript (and from your sig, three of them have moved onto requesting your full) is an EXCELLENT accomplishment. Try to banish the doubt and celebrate the fact that you have a story idea great enough to warrant this kind of attention, and that your partials to the three agent were great enough to make them want more. That's a milestone in itself.
In the meantime, focus on what you want to write next and start working on it. Then you have forward motion and something to keep you busy while you play the waiting game.
Seriously though, as everyone else said so much more eloquently, doubt is okay as long as you allow it to encourage you to work harder instead of allowing it to shut you down entirely. It has the potential to go either way and only you can make the decision as to where you let it take you.
That said, 8 agents who want to read your manuscript (and from your sig, three of them have moved onto requesting your full) is an EXCELLENT accomplishment. Try to banish the doubt and celebrate the fact that you have a story idea great enough to warrant this kind of attention, and that your partials to the three agent were great enough to make them want more. That's a milestone in itself.
In the meantime, focus on what you want to write next and start working on it. Then you have forward motion and something to keep you busy while you play the waiting game.