7 days delayed

hello sis. Irreg mens ko at last Oct pa ang last mens nagPT ako mid Nov kasi 1 week na akong delay negative, then I tried Dec 1 negative, then just week of Dec 19 nagstart na sikmurain ako with duwal-duwal effect na so nagPT ako night of 21 and early morning ng 22 both positive. I had my TransV ultrasound Dec 26 and I'm 7weeks preggy na with heartbeat na din. I asked the OB sabi nya normally less than 4weeks di pa talaga nari-read ng PT kahit nga sa TransV ultrasound wala din minsan madetect and they usually advised na bumalik after 2 weeks. Fighting lang!