It's been MONTHS since I've had a proper period. April actually. I was on the coil (copper, no hormones) though and I got it removed six weeks ago now. I had lots of spotting while on the coil, but since I had it removed, I've had two days (both within the same week) where I spotted. This was between 2 and 3 weeks ago. Now for the past 8 days I've had really really sore boobs. Back when I got periods, I would have sore boobs 3 days before my period came. I got a bfn this morning. What is going on? I'm 27 btw, with a six year old child, if that makes any difference.
Wait another few days, if no period arrives do another test, if its still BFN go visit the doctor. Sometimes HPT's do not always pick up a pregnancy (rare but does happen). The doc can do a blood test and go forward from there. This is how I found out I was expecting my 3rd, no period for 2 months, suspected I was updiffed (was TTC) but all tests showen BFN, thought I best visit doc he did a blood test and hey presto it showed I was updiffed.
False negatives on HPTs are very common. If you're not quite producing enough pg hormone for the test to detect it, you'll get a negative even though you're pg. And very occasionally, as icooksocks alluded to, your individual body chemistry can interfere with the test.
That said, I think it's much more likely that a) you're pg but not yet producing enough hormone to turn a test blue (try again in a few days), or b) you're not pg and your body's producing these symptoms because it's still adjusting to life post-coil. I had really sore boobs for the first couple of cycles after coming off the pill, despite being un-pg.