What gives??

Sa

My son is 6 months. Previously he had been sleeping 7 hours straight and then 4-5 after that.

The last two nights he has been up every 2 hours!! He also was taking a 45-60 min morning nap then a 1.5-2 hour afternoon and 30 min evening nap. Now it’s 30, 45, 25!! What gives?? I don’t see any sign of teeth or anything. I’m so frustrated