Eggwhite cm *TMI*

So, I should start my period in about 2-3 days, I woke up this morning with a TON of egg white/watery cm in my underwear. I'm usually very dry the following days leading to my period and this came a surprise.

My husband and I have been having unprotected sex because we "are trying" and by that I mean, he's on the "if it happens it happens and I'd be super excited and I hope it does" page, and I'm on the "I'm running out of time and eggs and wanna get pregnant now" page.

Although, (I haven't told him yet) I've recently stopped "trying" and "hoping" because we have been trying for 16 months.

I've had one baby already. He is 5 now. But I was told my blood type (B-) is a warrior with only one or two allies (B- and O-) my husband is A+.

Any how, I kind got off topic there, but back to the cm, is there a reason this would happen before a period? I know it coming, I've got the usual AF symptoms. But this hasn't happened before.

Its a clear color, sort of cloudy, no odor, so I don't think its an infection.