Feeling really suicidal

So I've been feeling really suicidal and alone recently. I've been diagnosed with clinical depression back in 2015 by a psychiatrist and I wa briefly on antidepressants but then I also attempted later that year. Ever since I've been trying to keep myself together. I just finished my college and I am currently home awaiting and applying for jobs. But lately, my depression is crippling me. I don't feel like living anymore but I am scared to speak to anyone about it. It all hurts so badly.