question

I'm 11 days late, I keep getting bfn.. I barely spotted, like implantation spotting last month but other than that there's been no bleeding.. we've been very active(every chance we get, every night).. I have pcos but I never skip months on my period, i usually have 1 or 2 periods a month.. I didn't have a period for February so I'm wondering if I could possibly be pregnant just not showing up yet or if something else could be wrong??