what i can understand from your writing is , you have a history of irregular delayed cycles.
recently you had a weekly positive pregnancy
test , following which you had several nonspecific symptoms suggesting of pregnancy .
but the latest pregnancy test shows that you are not pregnant.
cut down your stress
and just get an abdominal ultrasound
firstly it will rule out pregnancy.
secondly it will state the condition of your ovaries and the uterus
, and if ant pathology is present in them or not.
next visit an OBG specialist who can treat you for your irregular cycles.