Hi Bella,
I am not now, but I wanted to poke in and say I did. My first two kids are here in part thanks to progesterone suppositories. I actually took Clomid (50mgs. days 5-9) and then used progesterone suppositories from day 18ish (can't remember exactly now!) on until the end of the first trimester--as that is when the placenta takes over nurishing your babe. The first trimester your baby is nurished with the help of progesterone, and then after the first 12 weeks the placenta takes over and you can stop the progesterone.
My progesterone was natural progesterone made by a compounding pharmacy into suppositories--I kept them in the fridge and used them twice a day.
I had tried for 2 years to get pregnant with my first child, and for me the magic bullet was the Clomid and progesterone. First I tried only progesterone, and that did not work--then only Clomid--it was my doctor combined the two that I was able to get pregnant and stay that way.
I hope that helps. And I had no side effects really--only more tiredness and greasier hair. My kids were both very healthy full term babies. They are now 9 and 12.
I did not know at the time that the reason that I was not getting pregnant was part of a bigger hormonal problem for me. I had Luteal Phase Defect then, and later at 33 suddenly experienced premature ovarian failure--which put me into menopause. I am glad I had my kids when I did and was able to use the progesterone to sustain those pregnancies.
Hugs,
Lisa