Ovulation help

Ok so I started clear blue digital test yesterday it said low fertility and today I got a flashing smiley  is it too soon to get a flashing smiley shouldn't it get to know my levels are something 1st I had sex last night because my dh just got back from a work trip should I have sex all the days that I get the flashing smiley ??? Or do I skip a day until I get the peek smiley ??? Any help would be great