Need advice...

This is day three of missed period.. Husband and I had sex on the 1st during my LH Surge. Had mild nausea last week but only when I started to get hungry. Broke out pretty bad as well... Which is unusual for me. I took a test two days ago when I was expecting AF, and the test came out negative. Last night I noticed a very light pink tint when I wiped down there.. When should I test next or should I just wait it out a little longer?