i'm 16 and took a pregnancy test on the 20th of last month it came back negative so now i'm nearly 2 weeks late on my period and just have white milky discharge have had that on and off the last few weeks. i had heart burn for 4 days constantly and really sore nipples but both have gone now. i was sick this morning but i think that was due to stress same goes with the head ache i have. could i be pregnant though? any opinions would be much appreciated..