long term effects of progesterone cream?

Kirsty
So this is my last cycle of ttc before we break for a while, and I believe I hv low progesterone as I hv heavy mid month spotting each month so that's why I believe I can't sustain a pregnancy... i def had a chemical in January. So I hv started on progesterone cream, as a last hope. Are there any serious long term effects people hv felt from it?