My period what off on Dec. 10, My ovulation between the 12-23. I had sex on the 21,22. I started having pink blood two days later, now I'm having brown discharge. Its day 5 as of today. My cycle due to come on Jan. 6.

What could it be? Should I take a baby test yet?

It is way too early. You need to wait 2weeks after your due date to take a HPT.

It is called a pregnancy test. And no, it is far to early. You have to miss your period and be 14 days late to even test. Always use first urine of the morning

It's been a week since you had sex. It's way too early to test for pregnancy. Pregnancy doesn't happen instantly. I would suggest reading up on how pregnancy works.

Before you even miss a period, the first sign of pregnancy, it's too early to test. Wait until your period is at least 2 weeks late, then test using first morning urine. Before that, you're wasting your money on tests that will likely be negative because you tested too soon.