It looks like a thyme which is absolutely desperate for more light. The pale leaves on weak, thin stems are symptoms of etiolation. You might also have a lot of separate plants in the pot from a cluster of seedlings.

I had a great Thanksgiving, Mary! The plant does indeed look like an oakleaf hydrangea. The only seeds I've seen were still on the plant, and they had a sort of 'maple' seed look, a thin, papery, wafer thing with a seed in it. I don't know if the seed in the papery covering has a hard shell. My daughter has some oakleaf hydrangeas, and, if I get to her house soon, I'll see if they have any seeds on them. I agree it couldn't be a milkweed, at least not any I'm familiar with. Sherry

Sorry didn’t realize that the photo didn’t go through the first time. Thank you in advance.

It's a Bidens species. Most are very weedy and many have seeds that attach to clothing.