Pregnant ON birth control???

I take my birth control everyday (so I don’t have a period), never at the same time, usually just a few hours after my scheduled time. I recently missed a pill but not sure when so I doubled up the following day. Only to realize that I still wasn’t on the right day so I panicked & doubled up again..

I had unprotected sex and he ejaculated in me. That was over a week ago. I have been taking my birth control still every day..

For the past 2 or 3 days I have been experiencing sore boobs, mostly my nipples. I’ve been nauseous (no vomiting), I haven’t been able to eat food today, it makes me feel sicker but I’m able to snack.

I took a pregnancy test 2 days ago that came back negative. However, it’s only been a week & some days since I last had sex so I feel it’s too early. I have a 2yr old already so I’m wondering if I’d feel all these symptoms faster than I did the first time I was pregnant.

Basically, is there any chance that I could be pregnant ????