I remember those puppy/teen months. It was an extremely frustrating time. You'll get thought it though, just be VERY patient and loving. It's like having a child in some ways.
I think your little one will benefit from being confined in a smaller space. I recommend crate training although not all on YT agree with that. It worked well for Tink and she is crated when I go to work. She is just fine and there are no ill effects. She gets some safe toys and her blanket and she is content.
I started crate training Tink the day I brought her home at 9 weeks. I got her on a Friday evening and it took until Monday for her to be poo-free in the crate and until Wednesday to be potty-trained in the crate. She still had the occassional accident for a few weeks but it was worth it. I used shop towels that I bought at WalMart and just threw them away. I lived in an apartment then that didn't have laundry facilities so I couldn't be running to the laundromat every night.
Now Tink is potty-pad trained and I buy the pads from this vendor who has some really great prices.
New Pads#
Good luck with your baby. Be very patient and show lots of love and you'll get through this!