no period since 9-11-17

hello I have not had a period since 9-11-17 it lasted till the 14 and had let's call fun time with my husband 9-26 when I was ovulating and still have yet to get my period. I have taken many tests and still negative. I'm moody, cramping, bloating, urniating alot and tires as all hell. don't know what to do or how to feel. this would be my 6th pregnancy. ( got a 4 year old and rest miscarried). please help....