Advice please!!!

OK Moms, I need your help! My child has not slept good for the past 2 nights now. Tuesday night, I went in his room 3 times to try and settle him down and get him back to sleep. No luck! So, call me a sucker, but I ended up putting him in the bed with us to try and get at least a little more sleep. Even after putting him in there with us, he tossed and turned for about 30-45 minutes before settling down and going back to sleep. SO, last night. He wakes up about 1:15 and I go in there, put his paci back in and lay him down and he goes right back to sleep. Yay! I thought, that's over with for the night and we should be good to go until morning, right? WRONG!! He wakes up again around 2:30. I try to settle him down with the paci and all. No luck. I give him gas drops and tylenol to try and fix whatever was wrong and go back to our room while he's just crying away. I let him cry for about 15 minutes, thinking he would eventually settle back down. WRONG again! I go in there to check on him and there's not a tear in his eyes. I tell him, firmly, it's bedtime, night-night, go back to sleep. Before I even make it to his door, he's already standing up and crying. I look at him again and firmly say, "Isaac, this is silly. Go back to sleep, it's bed-time, night-night. Mommy loves you" and pull the door shut, but not latched. Half-way back to our room, I hear this loud THUD and thought to myself, what in the world has he done now? I go back to his room, and there he is, standing at the door just crying his eyes out. I checked him over from head to toe and couldn't find a scratch or anything at all. So me, being the sucker that I am, once again put him in the bed with us and he went right to sleep and slept the rest of the night. So, I guess I have a little escape artist on my hands now! His crib converts into a toddler bed, but I just think he's way to little for that just yet, but on the other hand, it's much closer to the floor should he try and get out again. I need help!! Any advice???