Can you help me figure out how to help my 5 1/2 month old?

My little boy was congested for 3 weeks and is now finally cleared up. However, he has GREATLY regressed in several areas and I am afraid I have started him on some bad habits. He used to sleep 7-7 straight through, going to bed drowsy but awake. He would take 2 good naps during the day, going down awake and putting himself back to sleep if he woke up in the middle. He would talk and talk and didn't take a pacifier too much. Then he got sick and since he is so young, I catered to him completely! Now, he is nursed to sleep (I can't keep him awake!), goes to bed with a pacifier, wakes up around 5am, takes shorter naps or skips one altogether. That wouldn't bother me if he were fine, but he only wants mommy now, cries a lot, is super cranky and sleepy a lot, fights naps, doesn't "talk" and play like he used to, etc. You get the picture - my little boy has "been spoiled" (if you can call it that) and I am just wondering how I can change his sleep schedules to get back my super happy baby!