Pleasure - I wish I had had someone to ask at the time as thought it was just me!
I put off starting it as it was over Christmas 2019 and I was worried about swapping as felt so great on Provera. My initial two weeks (ish), was great and I was thinking I had made a mountain out of a molehill and so my reaction was about 2/3 weeks in. It really threw me as was expecting a reaction to be immediate and so thought all was well but then it started to change.
My reaction was both mental and physical - my mind and thoughts wouldn't stop (even at night - so little sleep), and I felt I was constantly battling with it. Always negative and so not 'me'. All my previous anxiety issues returned and seemed worse. Physical ones were racing heartbeat, shaking, nausea, tummy ache etc.
But, at the point I was thinking I can't bear it and it dawned on me that it could be the Utrogestan, I spoke to my doc and he was great. As I mentioned, we spoke about other medication options but as I couldn't really go back on the Provera and he wanted to be sure we had given the Utrogestan the best shot, he asked me to hang on in there for two more weeks. He was right and it did settle. Almost as quickly as it crept up on me I realised I was feeling stronger and better in every way.
I really sympathise and keep me posted. Hope this helps a little put your mind at rest.