I had the same reaction as others, that this sounds exactly like depression to me. My Mom has been hospitalized for depression more than once, and two of my three current partners are also sufferers (as weird as it is to say on a topic like this, I guess I... have a type?). My point being that the signs become very familiar and you are showing them clearly... loss of interest in the things you once cared about, loss of a normal range of feelings, loss of a sense of connection to yourself and the world.
Sure, you could wait until it gets worse to get help... but, by the time it's worse, will you care enough about yourself to bother? I would strongly recommend seeing someone sooner rather than later.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.