Afraid it will be negative....

Mrscox0910
Been ttc for almost 7 yrs. Very irregular cycles. I have Grave's Diease.... I believe I ovulated Jan. 5 we baby danced... But I have been having sore nipples for almost two weeks... I keep getting nauseous at night and now headaches. I know I should test but I don't want it to be negative... What should I do???