Hi ... I keep track of my Menstural cycle and my fertile days etc... my partner and i had sex on 2 of my fertile days and on the day that i was ovulating according to the electronic calender i have. if i was to be pregnant i would be in my forth week. i was supposed to get my period today but i havnt had any sign of it. My breasts are fairly tender and feel as though they have grown 2 sizes and my partner also commented on how much bigger they look. i have been getting headaches and heart burn, also feeling bloated and full like a just ate and feeling very gassy, also experiencing tummy pains almost like period pains and intergestoin combined but no sign of a period. :/ can someone please help it would be much appreciated ...