What should i do?

Patient: Im 23yrs and me and my husband have been trying for a baby now for 6 months and this month my period is 7 days late, on the first and forth day of my late period i took a hpt and they were both neg.now i have a whitey brown discharge when i wipe? what is going on?my periods are allways on on time time ­čÖü in the last week i’ve been suffering from dizzy spells and slight nausea found myself being so tired at times its hard to stay awake. please help