you need to contact your local vet or county extension office, each area is different. here i worm every six months and vac with blackleg(the cows so they can pass the immunity to the calf) and lepto vibro there alot of choices, but you don't want to waste time or money giving something that is not needed.
This is a general statement. Most people in Ohio vaccinate for IBR, PI3, BVD, and BRSV as well as lepto and vibrio. Those south of I-70 tend to vaccinate for blackleg and depending on your area (talk to your vet)
you may also need to vacc. for one of more of the following Clostridium (many types), Pasteurella, Haemophilus. However, I would NOT vaccinate at this stage of the preg., as was state earlier she should have been vacc. before breeding.