Vaginal Delivery after 2 c-section.

Hi. I`m now pregnant for the 3rd time , after 2 c-sections (first due to no progress is delivery, second due to a big baby 4Kg AND my doctor said not to take a chance), would it be too big of a risk to try a vaginal delivery this time? It has been 3 years since my last c-section, if it matters, AND I`m healthy, exercising during the pregnancy AND all tests so far are fine. AND what if i get to the delivery room in labor, will they let me try? thank you!!

In "sheba" AND others, after 2 CS, there is strict guideleine. to avoid vaginal delivery/