I leaked too around that time, my doctor said it was fine and no biggy... Happens to a lot of pregnant women...
Could b pee, it happened to me once before
The baby is so closs to the bladder that it could very much be urine. When you cough or sneeze, pee a little. But if it becomes accessive I'd call your Dr
There are a few things it could be, urine, cervical mucus or fluid. If it only happened once, and not again, then I would say it isn't fluid. If you want to be sure, wear a panty liner. That way if it happens again you can take your liner into the ER or to your OB and they can do a check for you.