Do you think that I could test already?

I am on a bc pill and had my last period Nov. 10th. The week before that I came down with the swine flu and was given tamiflu for a week. Had a normal period, but then halfway through my next pack I started having light spotting (light brown) that lasted for 4 days. It was just enough to get on a pad. Now my feel tight and my husband says they have gotten a little bigger and my have gotten a little darker. I due to start on Tues...is it to early to test?