If at any point you start doubting what God has said concening you...kindly open the bible. Search back and forth till you get to the place where it is 'written'.
(LK.4:17).

Then, kindly read....word after word to your hearing---for faith cometh by hearing. If that is not still enough to 'clear your doubt'.

Dear go for a personal retreat:
For Elijah, he ran to the mountain of the Lord(Sinai). Dont be suprised to find God waiting for you there, just as in the case of Elijah
---get as many... messages/books/tapes etc as possible. My best so far is: Activating seasons of breakthroughs: Ministry of destiny helpers-
by Apostle Joshua Selman.

If the above two doesnt work... Visit your spiritual head(A Reverend Fr./Pastor/mentor). I have seen first hand what God uses such people to do. One word is all you need. When you get it, run along with it.