I'm not 100% sure if this is Speedwell: Speedwell ( photo / image / picture from Canadian Chelsea's Garden )
I think the leaves are longer on Speedwell, that could be Purple Loosestrife. The color looks more like Loosestrife too. Loosestrife is Usually pretty invasive
Thank you Toni, but I honestly don't think it is Purple Loosestrife. My plant is only about a foot tall and has the same leaf as this one: ( photo / image / picture from Canadian Chelsea's Garden )
Yep, it does look like Veronica spicata (spiked speedwell) I had been looking at another variety with larger leaves. From what I can find, Speedwell is the common name for any of the various plants of the Genus Veronica and with almost 500 species, it probably does include some creeping varieties.