You'll be fine, dude.
I get a sense that when you are sick like that for a while, your muscles realize it and, like the rest of your body, they shut things down for a little bit to conserve whatever energy they can. Now that you're better, you just need a few workouts and some good nutrition to wake get everything back up. Think of a manufacturing factory being shut down for maintenance, it takes a while for the machines to properly fire back up, but then everything's good.
Your strength isn't really down that much, and you've only had a couple workouts so far, just keep doing what you are doing.
I was in the hospital last year for a week after overexerting myself at an Ultimate Frisbee tourney in 110 degree heat, and suffered some rhabdo along with it, which meant my muscles literally were eating themselves. I lost about 10 pounds but looked like I lost 20. When I got my energy levels back and was finally able to work out again, it only took about 3 weeks to get my strength back and look normal again.