IVF Treatment I’ve been trying for years to have a baby

Hi my name is dozsha beckwith I’m 29 years old I’ve been trying to have a baby for about 3 years now the doctors aren’t sure what the problem is so I believe the best thing to do is go to fertility clinic but I know going down that rode is expensive but all I ever wanted was to be a mom have someone that’ll love wholeheartedly me and my fiancé would appreciate any help I believe I’m the problem because he has 2 kids already and we haven’t been able to convince one we’re not giving up we just need a little help and guidance thank you in advance and God bless