I Feel So Alone

My anxiety has been at an all-time high the past few months and I don't know what to do. I cry uncontrollably over nothing, get intense panic attacks out of nowhere, and am constantly afraid that everyone will leave me. I feel like I'm just living constantly in fear. There is always this tension within me and at any point, it'll snap and I will become completely undone But life outside of my mind is fine; I should be fine. Things are better but I am not.