Werid lag

Recently, I've been getting strange lag on my server. When I join, I get a lag spike that repeats every few minutes. This never happened before, it only started a few days ago. It is not FPS nor server lag, everybody else is reporting no lag. I even checked the console and there's no problems whatsoever. When I go onto other servers, I never have this problem, it only happens on my server. What is happening? Thanks.