13 days late

So I am currently 13 days late. I took three tests all before I was 7 days late all of which were negative. I went in at 8 days late and she said it was negative. She said I could have ovarian cysts that are making me late. But I just feel like I am pregnant. I have a hot face like I did last time I was pregnant and even though I am breastfeeding still i can see a slight enlargement of my boobs. My son is 15 months and only feeds at night. During the day my boobs are small but now are fuller and heavier. I am afraid to take another test for fear that it will be negative again. Any advice or support will be appreciated.