There is a little weed charmingly called Lady’s Thumb, which is very common and looks a lot like this. It took me a while to notice that all these varieties of smartweeds and knotweeds are NOT Lady’s Thumb. There are about 35 varieties in this area. This one is a paler pink. Also, Lady’s Thumb has a dark smudge on the leaves. Buckwheat family. Native.
Pink Knotweed (Polygonum pensylvanicum)