Condom ripped but i’m on nexplanon?

Hey so I got nexplanon on June 8th and then had sex on the 22nd but the condom broke and I couldn’t stop freaking out!!! Literally two days after that I had my period which was weird because I had my period already for that month. After 2 weeks I took a pregnancy test and it came out negative but this whole week I have been experiencing symptoms of pregnancy like slight nausea, lower abdominal cramps/pain, vagina cramps/pain, and sometimes a headache. I was suppose to get my period this week but nothing is coming, what do you guys think?? Am I pregnant ??