Try to stop yourself in mid-stream. At least you notice it, that's a sign of personal growth. Try to figure out what's got you there, time of the month, hungry, sleepy, just irritated. If you can catch it in the act, while you are being pissy, stop and say 'just ignore me' and just continue letting it out. It's best not to be around people during those moments because nobody likes it.

I used to get really pissy when I was sleepy, but somehow I managed to get it under control. I think by my husband bringing it to my attention and then I started noticing it and somehow it just stopped.

I don't think you have an unhappy personal life, if it's things from the outside, just shut your door to the world.