I took Siphene 50mg to assist pregnancy. Now i am 4 days late on my period and my hcg has come back negative. My back and my legs ache a lot. i am also having lower abdomen cramps. can someone help in decoding the situation i am in ?? am i pregnant ?? or should i expect period soon ?? my period is always on time. my doc asked me to wait a few more days to take another test. but the wait is killing me.