Cut my finger half an inch deep. much blood, cant afford stitches. sprayed liquid bandaid on it, cant wash because excrutiating. will it heal and how long???

Finger cut: A hand cut 1/2 deep is pretty substantial, especially if it was on the fingers. You could have damaged a nerve, vessels, or tendons. Though, you state you can't afford an ER visit, I would suggest you still go. Especially if you have any numbness of the fingers or lack full range of motion of all your digits and joints. A "paper cut" or superficial cut can be glued, but can lead to infection.