Well I am glad to hear they started. I find it worrying when they don't. Sometimes I think it's the menopause but I am a bit young, my mum didn't get it until a bit older.

It could be stress as that can really mess them up. Or even just being under the weather I think.

If you are not on the Pill and they are a bit irregular I wouldn't worry too much, it probably is stress. Mine used to be regular as clockwork on the Pill, but never so off it. Would keep an eye on it if it keeps happening long term though, as you recover more from your trauma.