I need advice about my VERRRRY late period..🤦🏽‍♀️

I'm 13 and I had my period in January and I haven't had it since.. Its May right now and I don't know what's going on. I have had spotting and discharge but not my actual period. I know I'm not pregnant bc I haven't had sex sooo.. that's impossible. Does anyone relate or have an answer to why this is happening or a possibility why??