2 years, 3 failed IUI and a miscarriage

Trying really hard to understand why this isnt happening for me and yet most of everyone around me is able to get pregnant without hesitation. IvF is just too expensive and the plan is to keep doing IUI till the end of this year... after I give up.. cant keep putting myself through this emotional roller coaster each month. At least I have my 2 fur babies.. husband is being super supportive and understanding. I dont want him to be disappointed in me for not being able to have his baby.. *cries*