weird?

I have a question, I really don't know what to do! We've been trying to get pregnant for quite a while now! We finally succeeded but then had a miscarriage and later found out it was an ectopic pregnancy... had some problems for a few months... my cycle was normal again at 28 days but now suddenly 5 days late. Did a few tests but always negative, including the one from the pharmacist and the Kruitvat test I just did, and it was really very faint, so faint you barely saw it! Or we just think we need to see it! Because I really have all the symptoms that my period is coming: sore breasts, sometimes nauseous, tired, grumpy, pain in lower abdomen and lower back... we really don't know what to do? Can you help me further...