being pregnant? I had unprotected sex on the first day of my period on feb24th... I also had unprotected sex on march17th.. I normally have 35 day cycle and my period is due on wed... I've been getting really bad head aches the last 2 weeks.. I also have had tender breast and felt nausea for 2 days without getting sick... Then today I realise there was little white subtances in my nipples. Also I don't know if this is completely unrelated but my finger nails have gotten really strong and long... could this all be in my head??I have taken a few HPT and they have came up neg,but is it too early to get a positive answer? I would like to get a positive result!