Just a little worried..

you're probably starting to lose your mucus plug, which is normal. it could still be a few weeks before you even start feeling contractions and things, but if you do experience them (continous, get worse, cant sleep or walk/talk thru the) then i'd call the dr.

I was also going to say it sounds like your mucus plug. But if your still concern call the doctors office.

i was having the same thing from the time i turned 30wks til now and im 40wks and about to blow...it sounds normal...it just probably looks funny almost like ur vagina sneezed lol

my advice, it never hurts to call the doctor.. you may think its a stupid question or its nothing but something you think is so little could be a huge deal.. that happened to me when i woke up not being able to breathe with major pains, i thought nothing of it, waited to call the doctor later and found out i passed a gall stone and had to have my gall bladder taken out at 20 weeks, i am currently 31.. so just cause you think its something minor it really could be something major.. i would call anyway and mark it down, so that way if the doc asks you about it at your next appt you have notes to look back on as well.