how do identify sources of negative energy???
I have spontaneous days of crying. I find it is picking up negative or heightened emotions from people I pass on the street, things I have touched (used furniture or clothing) and spaces I have been in that are new and unfamiliar. Energy can imprint onto physical objects not just carry around in people's energy.
My guess is it might be a coworker that was carrying something around and you just caught a bit of it (being sensitive to these things). It is hard to be "on guard" all the time. Try envisioning light surrounding you or that your protected wearing gold armor. Putting a barrier between you and others can help.
There is nothing wrong with releasing energy by crying. Better out than in. Sometimes it is built up emotion about things are are dealing with and need to release.
When I was first starting my healing, I was crying at acupuncture uncontrollably, even at massage and at reiki. I felt so silly but I also felt so relieved it was out. My shaman was working with me distance healing, and i cried so much. I even had past life regression hypnosis done, and released a huge chunk of ancient trauma.
I hope this helps. You are not alone. And you are certainly not crazy.
I once tried medicating myself for depression and anxiety (regulating my emotions). I felt so empty and blah. It took away the bad, but is also took away the good. It made me realize how amazing having emotions was, despite the fact i was struggling with bad ones at the time. This is a gift. Caring, loving and being emotional is an amazing gift. Others will get on board with it one day. Embrace you, love you and your light will never be snuffed out. Your light will draw others with light in.