I have all the symptoms of pregnancy and am 3 months late for my period and have put on weight, my husband tells me it looks like i have a watermellon in there sideways. my breasts hurt, nausea, clear or white discharge, headaches, backpain, tired all the time, moodswings, sensitive to smells and 4 other pregnancy symptoms. but i keep getting negitive results of tests even blood tests. could i be pregnant?