Lag Spikes, Worlds Take a While to Load

I get lag spikes every 1 - 2 minutes on my Nintendo Switch! They last 5 - 20 seconds usually. It used to only happen in my offline multiplayer world, but now it happens everywhere! Offline, online, singleplayer, and multiplayer. It lags in the docking station and in handheld mode. My worlds also take longer than they should to load. Someone please fix this!