So confused

June 4th- June 10th I had my period then didn’t get my period for 49 days...

then had my period July 30th to the August 4th and now I’m 26 days late...

Before these past two months I’ve always been regular every 28 days and period lasting 7 days..

Also we had been using protection- condoms before we started trying for baby number 2 two months ago?

Could I be pregnant and it showing up negative on the cheap pregnancy strips?