Generally my period cycle is 28-30 days.But in march i had my periods after 23 days of last period date on 17th march.I am trying for pregnancy and felt ovulation cramping on 30th & 31st of march.After that since 9th april im having different type of feeling.Whenever i stand & work i get pain in lower abdomen on one side & on lower back but after resting the pain goes away.Today i did beta hcg test which came negative(<2).I just want to know whether is there any chance that im pregnant but not detected in blood test & may be after missing my period date will get a positive.I have a feeling from inside that im pregnant with weird weird symptoms.Please any one with experience & expert advice guide me because it has become difficult to wait long for a positive news as there are no symptoms of period coming but the problem continues.Please help me.