late period

Jessica
So I'm 16 days late. I've been extremely nauseous lately and tired. I've been having a lot of trouble with acid reflex lately, and it is consently bothering me (it never has before). I feel sick in general. I took a pregnancy test and it came back negative. I'm going to wait a few more days and if I haven't start, I'm going to take another test. Do any of you have any suggestions on how to start feeling better?