 [ Symptoms ] can impetigo form on the lips  i have a small blister under my nose and woke up with a very big blister looking on mouth could this be impetigo [ Disease ] hi stressed soul if you have been stressed ever since this happened then it could stress that has stopped your period but if your really worried get to a doctor and get a pregnancy test done there if it comes back clear then this would be the time to ask your doctor about bc like the pill remember safe sex is the best sex good luck ps somehow i do not think your pregnant