Hi kazza :-)
Not sure yet what caused this, dr google says anything from early menapouse ( really hoping its not that) to follicles not having an egg, to over suppression due to the pill. So will anxiously wait for the fs appointment which is 2 weeks time.
Wow it's mrserin, it's good that they tested for that so early on, but a bummer that you have this issue. Hopefully this is THE cycle