It's not clear all is lost. 

1. As mentioned, don't go looking at c or d, it will only confuse
you. If you set up your original partitions using c or d as anything
less that the entire disk, you would have been in trouble before now.

2. Take a look at your disklabel and fdisk reported partitions. Make
sure they make sense, both on the disk, and in your head. If they are
changed, put them back. Contrary to what disklabel reports, it won't
destroy the data, *unless you write to the disk under the wrong
label.*

3. If the disklabels was changed and youhave put it back, it's
probably o.k. If they were newfs'ed with bad labels, you may have a
problem, bt if they had the right label, than the newfs'ing won't do
anything bad, except to do the same thing it did last time, assuming
you went with the disklabel default.

I over wrote, re over wrote, and just plain hashed my partition tables
twice while installing a 3rd IDE disk. Kept typing wd0d instead of
wd2d. Never lost a single file.

Good Luck.
--
Hacksaw