Hi Mrsr
This is totally normal, when i was around 10 weeks I was at work and just started crying for no reason at all and couldn't stop. I had to go home for the day and whilst everyone thought it was quite funny I was so embarrassed!
Even now I find that small things will set me off where they wouldn't have bothered me before.
You just have to go with it and remember it's more than likely just all those crazy hormones floating around!
Take care