How many Dpt are you? Have you POAS? What day is your BT? The 2WW is so hard with all the progesterone making you feel pregnant. 4 pessaries is a lot! I bet they're no fun. Sorry to hear your feeling sad. Let it out. We're here if you need to talk.
Last time I spoke with my FS he said we'd give it 5 transfers before more investigations. At this stage we're 'unexplained'. At first the diagnosis didn't really worry me too much but now we've had repeated IVF failures the unknown is causing me quite a bit of anxiety.