I'm having some plumbing problems and need some advice.
I live in NC and we've had a lot of rain/snow/ice lately, so the ground is pretty much saturated. I'm not sure if that is of any use, but wanted to say that up front.
A week or so ago, the dishwasher and clothes washer started backing up into the bathtub. The toilet works fine, and all of the sinks all drain perfect.
I've tried pouring stuff down the bathtub drain, but that hasn't worked at all. Any ideas? Any help is appreciated.

Eventually all the drains come together. Right now you have a clog after the tub and washer but upstream of the toilet. You could rod down the vent stack or down the overfklow plate of the tub. Saturated ground would only be affected if you had a septic but the toilet would then also back up.

Now the clothes washer has started backing up in the kitchen sink. I'm pretty sure the line is... Dishwasher, kitchen sink, clothes washer, bathroom sink, tub, toilet, out to the septic.

Forgive me for not knowing, but what's the vent stack? How would I go about finding it?
Also, I'm not sure what the overflow plate of the tub is.

Thx for the help.

now the clothes washer has started backing up in the kitchen sink. I'm pretty sure the line is...Dishwasher, kitchen sink, clothes washer, bathroom sink, tub, toilet, out to the septic.

Forgive me for not knowing, but whats the vent stack? How would I go about finding it?
Also, I'm not sure what the overflow plate of the tub is.

Thx for the help.
I can help you find the roof vents and the tub oiverflow but before that you should have your septic tank checked to see if if it needs pumping.
You may have to call out a septic tank company to locate both the house cleanout and the tank itself. Good luck, tom