if the retest doesn't work they you may need to go to the Dr and have a blood test if you still dont get your period . That happened to me i didn't have a period for 3 months and i took test after test and they were all negative and i went to the dr for my yearly exam and they told me i was almost 4 months pregnant. I didnt have enough HCG in my urine thats why it didnt show up.
It's FAR too early to be testing. You need to wait till your period is at least due or late for an accurate test. You can't only go based on symptoms because they mimic other things. Wait till your period is due and see if it comes as usual. If it doesn't, or it's lighter than normal, take a pregnancy test with first morning urine. If it comes up negative, wait a few days and retest.
and ive also noticed that my face has gotten fatter.