Just wanted to update. Vet said he seems fine but keep an eye on him just in case. Magnus already had his lyme shot since I knew there were deer ticks around here. Btw, I think they're called some sort of "dog tick"? I looked all over the web to see if I could find the one I caught.
http://webpages.charter.net/balplanman/_MicPix/Ticks/DeerTickFemales.jpg
The one I caught was bit greyish and it did look little plump. But it's just weird that I found it on the couch instead on my puppy. I check Magnus regularly since his first tick incident so I would think I would've found the tick on his body instead. (not that I'm complaining about not finding any.. lol) Have you guys found ticks just laying about before? I spent HOURS cleaning the livingroom and kitchen afterwards. LOL