I started my last period on December 16, I had unprotected ladt week and I've missed my period which was due on the 13 of January. Ive also tried two pregnancy test's and both came out negative. But I've noticed that I'm eating a lot more since. Is it certain that I'm not pregnant? Im confused!!

You should try testing in the morning when you can wake up because that urine has more HCG, so your test can be more accurate. Do you have any different symptoms? If you keep on testing negative, go get blood work done at the Planned Parenthood or your PCP. Good luck