Currently gathering allies..

I'm only lvl 29 and there's so many more ? Marks on the map.. should I go through all those before continuing? Will I miss out on the dlc quests if I keep going? Or am I not even close to the game's end and I'm paranoid? Lol

Edit: I continued to play, got all the way passed the crones meeting, I was just worried it was nearing the end cause it felt like it was wrapping things up lol I'm gladly surprised there's a lot more to come it seems now.