I'm the same right now! For the last few days I've been bursting into tears, usually out of the blue. I've put it down to not only hormones but also because I've been sick with a cold for the last week and not sleeping much.
The other morning I started crying in the shower for no reason, but this morning while watching the news regarding the attack in London I couldn't stop crying (although this is slightly more acceptable as both myself and bf work in public service and he went off to work there this morning)
Here's hoping it passes as soon as it came on!