I dont think bitcoin is under attack maybe the reasons why its because of heavy traffic or congestion. I also encountered this too long to be confirm in my wallet, blockchain problem that took 2days confirm in my wallet. I think its trhe volatility price of bitcoin that most encountered this problem.
The attack is the traffic, someone are doing a lot of microtx just for increase the traffic. I don't know who or why but it's real. For now, the best solution probably would be increase the blocksize..
Oh another expert in the field! Who already knows the best solution. One advice: if you don't know who or why and generally have no idea what is going on, do not come up with solutions, first understand what's going on.