Can someone please help me. I experienced a chemical pregnancy a few months ago. I have irregular periods and my last period was 4th jan which I am now 3 days late for but have long cycles so not exactly late. I have been using a clear blue opk so I know when I ovulated this month. I have took a variety of tests and faint positive lines showed up on first response, superdrug and tesco own. I have took a clear blue digi today and it came up not pregnant :(. Whats weird is I did an opk last night it and it came up with the smiley which means peaks fertility!? Ive rang my doctors but they dont do pregnancy tests there which is weird they say if ive had faint positives then im pregnant but im just not convinced i am now 17dpo why are they so faint?! please someone help.