I am 15 days past ovulation. As said past few days I'm tired and dizzy and since last night nauseas. Almost vomited today after eating chicken. I never feel sick after eating . Last night I felt sick after chocolate. I have cramps like period is coming but I'm 15dpo. Could I still be pregnant? I tested yesterday and negative. Not even a faint line. Just nothing. I don't have anymore tests and can't really afford to buy another one til next week as rent is due tomorrow.