The first one looks like Vinca.
The second is a Myosotis, forget-me-not
Third could be an Erigeron, a daisy.

For ID purposes, it would be really helpful to have pictures of the leaves and stems as well as the flowers.

Yes, native plants just grow naturally in the wild, no gardener needed. Your first two plants are not native North American plants, they are non native periwinkle(vinca) and forget-me-not that have escaped from gardens and invaded the wild. The third may looks like a fleabane, possilbly native.

Of course, if you do not live in North America, then these may be native to your area.