What kind of spider could this be?

Question

It was smallish and orange-red, and it was so strange! It would curl up into a ball, and then scurry further, and curl up into a ball again! It had a bulbous back with a brown spot. I'm kinda worried if it is poisenious or not, because it is in my bedroom, and I lost track of it. Any ideas and pictures are appreciated!

Answer 1

Spider Identification.org provides a community to help identify common spiders of North America with guides and high-resolution digital pictures

Answer 2

If it has a red hourglass shape on its back it is a black widow. The body should also be all black. If it has a violin shape on its back, it is probably a Brown Recluse. Both are poisonous and the only two spiders in th US that are poisonous.

Answer 3

Ahh! I'm scared. D:

I really someone helps, spiders are so hard to identify.