Calculated ovulation on december 7th. had sex on the 5th and 7th. had some thicker like milk discharge following week. possibly pregnant?

Too early: A home pregnancy test is reliable 11-12 days after a (certain) ovulation or 1-2 days before and expected period. I'd ignore the discharge, it tells you nothing. Hope this helps, good wishes.

Maybe: The discharge is not something I would use to evaluate for pregnancy. You could do a home pregnancy test at this time, BUT I don't recommend that until your period is late. Pregnancy tests are now very accurate but sometimes you will get a positive test then get your period. That would be what we term a "chemical pregnancy" meaning it never got off the ground and you lost it. Makes u crazy!