4 failed IUI's over span of 1 year

I feel defeated. This is secondary infertility and have been TTC a little over 2 years. My next recommendation is IUI with daily injectables, but as time goes on I am leaning more toward IVF. Should I really mess with another IUI? What if IVF is a failure? That is too much money to lose if it's not successful and do i really wanna do that to my body?! I cannot handle this anymore!