Hi, My period was due 3 days ago but hasn’t arrived, I have however had lower back pains and felt a bit twingy. I did a pregnancy test yesterday and this morning and both were negative. I’ve been looking at lot online about this and some people have said to try another test in a few days as the test may not be detecting the hcg in my urine but do u think I would need to go and see my doctor due to my period not starting? I’m just worried it may be some underlying problem. My periods prior to this were normal at 27/27 days. We have been trying for a baby for the past 3 months. Just need a little advice.