6 months is a little late to start swaddling, but you could do it for a bit to teach her to fall asleep indepently. You'd swaddle both arms, till she 'gets it' and then leave one arm out and then both. I use the puckababy and love it, but that might be a lot of money for just a little while. Here's the link if you are interested:
http://www.puckababy.com/en/1-the-original-mini.htmlOh and yes, pretty much EVERY LO does this, unless they may be angel babies
. And even then, they go through this phase. It WILL pass!
And I would highly recommend to remove the bumpers since she moves so much. It is very dangerous and she could get stuck in there and choke herself. If you need to block out visual stimulation, try to darken the room a LOT. OR hand a mosquito net around her crib, you do need to remove the net once she starts standing and can reach it, since that can choke her as well.