I did, but then I also found it wasn't "random", nor was it "unresolved emotional issues" the way some people are describing them.
I now find that if I "randomly cry" I can actually go through a checklist of specific things and pretty much always one of them will be true.
1. Have I eaten regular meals recently?
2. Has the food been at least minimally well balanced (i.e. not all sugar or simple carbs)?
3. Have I eaten enough meat recently (this is why vegetarianism and veganism did not work for me, one of many reasons, despite my preferences for vegetarian food I just can't live exclusively on it even with supplements added)?
4. Have I slept enough?
5. Have I slept according to a regular schedule?
6. Am I turning on enough full-spectrum lights long enough into the night (I live relatively far north and have a family history of seasonal affective disorder)?
7. Am I on a new medication that might be affecting my mood in strange ways?
8. Am I getting enough time away from standard language (today I have not gotten enough, and expect this to cause problems later)?
9. Am I getting enough time away from interaction with people?
10. Am I in severe pain (I am the opposite of a hypochondriac and the opposite of someone with psychosomatic problems -- I think of physical symptoms in psychological terms and act them out as emotions, rather than take emotions and turn them into physical symptoms), and have I remembered my pain meds? Checking for physical pain might be extremely detailed and difficult and require someone else, it's far easier for me to tell my emotional reactions to pain than recognize the pain itself and where it's located. And I have several kinds of chronic, severe pain which makes it difficult to tell them all apart or figure out which one is going on right then. But most of them are treatable.
11. Am I late on any other medications?
12. Have I recently stopped an old medication?
13. Am I PMSing (I always get one major cry in the day before my period)?
After that, I usually find the cause of the "random" crying. It's actually related to one or more of those things, just about every time. And then I feel stupid for not noticing, but also relieved because I can now solve the problem. What's astonishing is the depth of the crying, it can feel like the world's going to end, then I eat a meal, or treat pain, or get some sleep, and suddenly everything's totally fine. Sometimes the crying is so bad it obstructs me from doing whatever it is that needs to be done, but once I do it and whatever it is has sunk in, the crying subsides completely and stays that way. Which is why I know it's not some kind of unresolved emotional thing, it's just a very strange reaction my body has to a number of stimuli, that's totally absent when those stimuli are absent.
(Many of those things also are triggers for seizures or migraines, I've noticed.)
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams