3.5 yrs for DD, including about 18 mths or so assisted conception. #2 was a different story, it was our second FET so only took about 3 mths. But obviously this time round we knew we needed IVF and we also had embryos frozen so didn't have to do a stim cycle thankfully.
I think once you've been a LTTTCer you will always have that same mentality - at least that's how it is for me.