Is this a thing?

You really aren't the only one who has dealt with this. I still deal with moments like this, and it kind of sucks.Because most people have their "highs" and their "lows" in life, and most people just accept that. They can feel sad during sad times and they can be happy during happy times. However, there are those who over-think and wonder if this is normal, if being this sad for so long really can be serious.But the truth is, there is a difference between having a "low" moment and being depressed. If you truly feel like this is more serious than just having a "low" moment than maybe seeing a real psychologist is a step in the right direction.If it's not serious, and your just feeling down for some reason, there are always people who care about you that you can talk to, either you friends or your family or maybe even here on Blahtherapy.I hope my answer helped you see things a little more clearly. Trust me, I've felt the way you are feeling now.

Sounds like a textbook example of depression. Of course it varies much between people but you more or less have the same symptoms I did when I was diagnosed with it. Some people can live with it and tough it out without seeing a doctor, I'd recommend seeing someone if it ever gets worse though.

it is definitely a thing, I struggle with the same issues. It's like every part of your body is tense and aware of your emotions, your stomach turns and what happens in your brain, is somehow outwardly palpable. It seems to me it could just be a certain symptom of depression possibly linked with an overactive brain. You say you are a very deep thinker, I am as well, it could be that since our brains are frequently active on a single subject, our entire body is included in the experience via neuropathways. It very well may be the brain communicating emotions to the external body. When this happens to me I just try not to think for a little while, granted it is challenging, maybe watch a bit of mindless tv, it usually calms down a bit. Good luck

It is a thing--and can be controlled over time both mentally and with medication. Self-awareness (including the body and its many levels of response) is key. I have had the same issue, and over the years lapsed in and out of awareness and this issue, with medication prescribed when the depression was out of control. Please try to see a pro counselor, and perhaps also get into "deep meditation" involving bodily awareness as well. And keep talking to people here, sharing your thoughts :)