Please help me!!!

So I’m gonna attach pics of my calendar. I don’t track ovulation other than checking cm which I knows isn’t an exact science and the ovulation dates on my calendar are just the dates glow predicts. So you can see the days my husband and I have had sex. My period was due yesterday and I didn’t get it. Not yesterday. Not today. I have only ever been late twice... I have two sons. That’s the only times. Normally my period starts early. Last month I was 2 days early. In February I was one day early. I took a first response pregnancy test this morning. It was negative. What is going on? I’ve been having sore nipples, fatigue, food aversions, slight nausea, and back pain, acne(I never get acne like the last time I broke out was when I was pregnant with my youngest but my face is so broke out right now) also *tmi normally before my period comes, my vagina is super dry like no cervical mucous but today and yesterday it’s like super stretchy egg white cm. What is going on? Am I testing too early possibly? With both my sons I tested positive the day my period was due. Idk what is going on with my body. I’m never late and I have no signs that my period is coming. Normally I get diarrhea and cramping. Also maybe I ovulated late and that is why I’m testing too early? My mom was 3 months with me and got negative urine and blood tests. Is it possible that’s genetic? My husband and I don’t use any birth control as we want more kids. I am still breastfeeding my youngest but I’ve had my period back for a while now. Any help would be great. Also has anyone ever tested negative and ended up being pregnant? How long did it take you to get your bfp? Thanks in advance.