I need advice

So recently I've just been feeling depressed about everything I don't know if I am actually depressed or not but all i feel is like down some days is not as bad as others but when I get close to my period I feel even worse to the extent of crying for no reason (I rarely ever cry) I don't really have a sad or a fulfilled life but I just always feel empty like I don't belong like I'm just an empty vessel, sometimes I just don't know how to feel.

.. I don't know what this is and I'm scared to speak to people about it cause whenever I do they tell me what do I have to be sad about or that I'm just over thinking it