Didn't know how to properly add photos, sorry they are so large

Anyone know what this plant is? It is very invasive and I cannot kill this... please suggest where I could get it identified if no one here knows.

Thanks

I had a bed of something that looked similar, white below ground, red stem. What I have is Lysimachia clethroides or Gooseneck Loosestrife. I planted mine from seed around my garden pond and it took over everything. I dug it out but the roots are brittle and break easily and they resprouted. I pulled out the new growth and now have it under control. The flower is a white spike that is made up of many smaller flowers. The flower curves down then up again and it does remind one of a goose's neck. I now have a small patch of it growing in a bottomless 5 gallon plastic pail dug into the ground and that keeps it in bounds.