Ok ~ you can get shot at feed store but our vets mix specifically for this area's needs. It is better, more complete and precise ~ specific.
Do have pkg colostum on hand BEFORE baby comes, as well as other stuff mentioned.
Try to keep her in the environment she will be calving in, helps her to be calmer as she is unfamiliar with environment and calving process ~ is a lot of new stuff happening for her.
Let her do what she needs to do when the time comes. Pay attention, be aware, but do not interfere if you don;t need to. This is something I have to remind myself ~ I want to be too much a part of the process sometimes, and maybe make the momma nervous. Is especially a concern with heifers. On the other hand (sorry if this seems I am contradicting myself, I do not mean to confuse), if you need to step in, do so. She may need assistance and you may need to help. Read back posts, there is a lot of good info on "when and if".
Also consider that things may go just fine. Yes, you still need to dip the naval, give the shot and vaccinate. But she may calf on her own, and be a good mom. You may want to consider giving the pkg colostrum regardless. Hers may not be adequate in value, and the pkg stuff is very good/very complete. That way there will be no doubts in that area.
Continue to do your homework between now and then. Ask questions for clarification if needed. Good luck ~ is a fun thing to have new babies :nod: