Hi, im 23 and currently working. For some reason when i am at work or at home, ive had this feeling of emptiness and hollowness in my chest every few weeks, as if it comes in waves and would last for days. But the empty feeling comes with a twinge of sadness that feels awful because it made me feel like theres nothing to live for and that nobody sees me and i am invisible. I dont know how to cope with this and i feel like a mess or like im being dramatic at my big age. Please help 
Dear @user674561
Thank you for reaching out. Please know you are not a mess nor being dramatic. What you have shared about how you feel low at times suggests to me you may be feeling overwhelmed possibly by multiple responsibilities at work and other areas of life.
From your post, I see that the feeling of hollowness in the chest and emptiness comes every few weeks, so I encourage you to track its pattern, especially what happens prior to it occurring. This may help you better understand conditions where you are more susceptible and take proactive preventative steps that reduce it.
Do take regular rest and recharge mind and body. Physical exercise, social activities and spending time doing activities you enjoy and feel valued for are key to living a balanced and meaningful life.
Do consider speaking to a counsellor, too. You can reach out to the national mindline counsellors at 1771 around the clock if you require immediate assistance. The counsellors can also refer you to appropriate channels for follow up if needed. The mindline website contains a service wayfinding feature for both community and self help resources.
I encourage you to reach out for any of the above recommended resources for well deserved support. 