Hi Mn,
DH and I have been trying to conceive for around 1.5 years now.
(Dh -33, Me -32). After nothing happening and becoming concerned, we decided to have our fertility checked out.
We have done so through a private, very reputable Clinic in August of this year. However we left feeling none the wiser about our situation and what to do.
Dh tests all came out very good. I have done all the standard ones (AMH, Fsh, T4, etc) excluding any checks for tube blockages. At our consult the doctor told us both sets of results are fine, so they have concluded it as 'Unexplained' and we were sent off to try for a few more months.
Upon leaving the consult, the doctor who performed my Dh sperm Analysis had a look at our file and suggested a Dye test?
He told me to go to my GP and just ask for it, I'm pretty sure this is not how it works 
. Anyway, we were quite upset at how unprofessional and dismissive all the doctors were (kept referring to our age) we left it at that as we were quite overwhelmed with all the tests.
We tried for another 2 months, and nothing 
. We are ready to start again with another Clinic, and still trying to find out a few good ones.
As this was our first experience and we were left pretty much unguided throughout, I'm not sure what to expect from the next Clinic. I'm sorry if this sounds unclear, just feeling a bit lost.