Hia,
I think you are barking up the right tree Vicky.
I cry a lot when my Oestrogen is dipping before having a bleed most times, just like PMT was when I had periods.
Hang in there, it will get better I promise. Once you have the estrogen coursing through your body at the right levels it'll thank you for it.
Till then it's just a waiting game, so don't worry about it and cry if you want to, as the song says.

Noting wrong with a good sob in itself.
TD X