Yeah, I had a half bottle at the end too...I just drank it because I read somewhere that too much air space and/or not enough time to carbonate can cause gushers. You're probably fine. I had a bottle bomb after one week of conditioning that actually blew up the bottle. I put one in the freezer for 30 minutes and checked to see if it was carbonated. It was, so I put the rest in there at that time too to avoid any more bombs. If your bottles aren't blowing up then you're probably okay.
But I don't have any idea what I'm doing, so RDWHAHB.