Breast Tenderness, Dizziness, Change In Diet. Can These Be The Symptoms Of Pregnancy ?

Hello, I was just wondering if you could help me figure out what was going on. I thought I was pregnant last month, I started getting tender breasts, and an increase of being hungry and tired. Though I got my period it was on and off spotting and then a little heavier bleeding . I took an at home pregnancy test and it was negative. Since then I am still having on and off breast tenderness , change in diet, and dizziness . I haven't been sexually active in a month and I am not an any birth control or other medications.