Help 21 days late!!

Rebecca • I have on baby girl who was born in April of 2014 and one who was born june of 2016!!

Ok ladies so I am 21 days late have had some spotting so light that I didn’t notice it until I had some slight cramping I have had super faint positives but the doctors say negative from a ua idk what else to do my boobs hurt all the time I’m so tired I can barely stay awake at work my stomach has been upset for 2 weeks now any advice please and thank you!!