Why do I feel like this 4th iui will be another fail.

No symptoms my nipple were sensitive but not as much as this pass two days. My cervix is low and pointy. I think my period will arrive soon. I really don't know if it's worth it going through all the struggles and pain all over again. Idk what I'm saying I know it will be worth once I see that baby. Sometimes I feel like I would never have that joy. :(