Since you're temping in addition to using OPKs, you were probably OK; but in general, it's not a good idea to take progesterone too early, in case you haven't ovulated yet. 3-4 dpo is much better, since you know ovulation is over by then. Plus, the embryo won't really attach to the lining until around 6-7 dpo anyway, so you don't really need it right away. Good luck with everything!
My RE says 3 days past positive opk to allow for ovulate to occur. They did tell me if you take it too soon, ovulation might be interrupted, so my RE would probably agree with yours.
Risa