Hi, I'm 24 years old, I have irregular cycle. For past few months the cycle came to normal. Usually i have 28 days cycle. This cycle I dont know exactly when i ovulated but can say that i had loads of egg white cervical mucus in mid of my cycle. Today is cycle day 29. I didnt get my period yet. But i have tender breasts, back ache, abdominal cramps in the evening. It started from cycle day 19. Its on and off. I took one home prego test yesterday (cd 28). It came up negative. Im worried now. Any advice?