Ill as in dizzy? If so, that's pretty common. I get very dizzy and feel kinda out-of-it when on progesterone pills in early pregnancy. If you take it once a day, you could take it right before bed, so you'll sleep through the dizziness (that's what my doctor suggested and that's what I did). Congratulations on your pregnancy!
You can try the pills, inserts or gel. I take 100 mg 3x a day. I don't feel sick when I take it. The pills can be expensive but with insurance and taking generic it's only $16. I'm not sure what you take but you could talk to your doctor about the other option. Good luck!
You can also take it as an injection. I forgot about that one. Not sure how expensive it is though.
I'm on progestrone and I get so dizzy feels like im drunk but my solution to it was taking right before bed and I sleep like a baby