I def agree that you should get your progesterone checked but typically they don't check it till ~ 7 DPO. My LP is usually 12 days but I also have a progesterone defect so you can't always tell by your LP. Anyway, I'm a high proponent of checking progesterone. No, I never did cream or anything for the defect but was given Clomid which helped one cycle. I actually did the cream way before being dx with the progesterone defect for another reason... to level out my hormones but NOT b/c of the progesterone defect.
GL!