Cervical mucus

So I am trying for #2. My son is 7.5 months old, he’s breast fed, but he also gets baby food and a bottle every once in a while. Mostly nurses at night, maybe 3-4 times a day. Sometimes 5. I got my first period in March. He was born in October. So I had one March, then April. Now I’m late. No may period, I believe 21 days late. I’ve taken probably a million hpt test. All negative. What’s going on? I have had raw egg white and milky cervical mucus for about 2 weeks 🤷🏼‍♀️