Colds

Is having a cold a pregnancy sign? I have one and af is due saturday. I work with preschoolers and thought t was just from them. I have crazy cramps, acne, back ache (last week) and nausea. I typically get sore breasts around my period, but they're MIA this week. Took a test 10dpo, bfn. Should I still be hopeful? I've wanted to be a mom since I was three.. I don't want to wait anymore!