PIO shots - side effects?

Blooming • 🌈 2 ER, 6 FET 👼🏼👼🏼👼🏼 2 fails, 1 chemical, 1 6w miscarriage, 1 11w MMC, 1 7w miscarriage - getting ready for ER # 3 No earthside baby’s yet

Hey ladies! I am starting my progesterone shots tomorrow morning and I was curious about side effects. I’ve been having some wicked ones on estrace (foggy, headaches, tired) - anyone have anything increase or add on once you started the shots?

Also, my lining check was today I’m at 9mm (woohoo!!) so I’m scheduled for transfer on 11/17, do I have any transfer buddies?!

Thank you in advance and lots of baby dust to all!!!!