The vet was out and examined her...he felt she had pregnancy toxemia. Prepped her for a c-section and pulled out a live 54 pound heifer calf. Calf is breathing on its own and alert, probably about 3 weeks early. Cow was stitched up and given an IV of Cal-Dex and hopefully will be doing better soon. She does not look great right now but has been thru hell the past 5 days. Thanks everyone for your replies. I doubt I would have called the vet so quickly if not for the urging of several of you. Hopefully now we can save both, or at least one. I know if we had done nothing they both would be dead.