I'm not pg yet, but I do take progesterone (Crinone, not Prometrium
, but I believe they are similar) and
I had similar issues that you had. I took it and it did make the LP longer. There isn't any harm done if you take it and really didn't need it. But, it good to take it in case you do actually need it. But, about the ins. thing - I know that my prescription without ins is somewhere around $150!