Injectable iui or ivf

Sheets • Ttc #1 3 years of marriage . Getting desperate ! But keeping the faith
Those following me know my story 🙁 3 years ttc unexplained infertility , failed first IUI with clomid .nothing is covered by insurance 
I'm confused should I do 2 IUi with injectables this time , which was quoted as $1750 for procedure plus $2000-5000 for meds  ( total average of $4-7 k)  or directly go in for ivf
Update : just a thought , IUi is just 10-25% chance whereas IVF is 50% chance . I don't want to waste 4K on IUI which fails & eventually have to go for ivf. I might as well put in this money for ivf where I know I have higher chances . What say?