My OB put me on 100mg of oral progesterone pills as soon as I found out I was pregnant because of two previous miscarriages. I was never tested to see if my progesterone levels were low though. They’ve been making me feel very dizzy and lightheaded on top of making it feel like it’s hard to breathe. I also think they make my nausea worse. I didn’t take one last night because I was throwing up so bad I wouldn’t have kept it down. And today I feel a little better. Anyone else had these experiences?