I have been double shot Pfizer'd up since late april. 2 weeks ago had some cold symptoms (headache, runny nose, sore throat) and got tested just as a precaution -- rapid test negative, but PCR was positive. I was a breakthrough infection!
Although I gotta shout out the vaccine for making me only have 2-3 days of really bad fatigue, cough, headache, confusion, rather than 5-10 days of that, I still had to quarantine for 2 weeks which sucked major ass and cost me so much money. my Quarantine just finished up.
even if you're vaxed, If you have coldlike symptoms, get a PCR test. I was in such denial that I could get it after being vaccinated but I guess it is happening w/ the delta variant.