I took the tea form and I liked it too. 12 - 15 tablets sounds excessive to me. I would try another brand.
My Ob also said there was no real proof, but it wouldn't hurt. He said the same thing about acupuncture. I did both and from my first contractions to holding my baby was 9 and a half hours. Not too bad considering it was essentially my first labour; my first was a c/s. I will definitely take the tea again next time, I think it did something.