DS having involuntary eye movements. Help!

I noticed today as I was rocking DS before his nap that as his was getting sleepy and his eyes were wandering he would periodically 1x every 2 minutes or so look all the way up and to the left. ?It looked farther then he would normally look. ?It would happen very quickly and then he would bllink a few times. ?It seemed strange but we spent the day in the heat and sun and he was drifting off to sleep.

Once he woke up I noticed he did it a few more times while we were having dinner. ?DH said he would watch it while i went to work for a few hours. ?I text him and he said that he was fine and hadn't done it (easy to miss). ?When I got home DH was finishing night time books so I went up to join them and rock him a bit. ?Again he did it repeatedly as I was rocking him. ?I called DH back in to rock with us so we could both see the same thing. ?I will call the dr in the morning. ?

Does anyone have any idea what this could be? ?Also, after his nap I noticed that one eye looked more open then the other. ?It looked almost like it was a bit more open then usual, but very subtle. ?I didn't notice if it was still like that tonight. ?I am hoping it is something minor like a sty coming in or something. ?I am so worried.?