Immediate PIP in Chest After Injection

Hi all, I pinned my right pec (about 2 fingers above my right nipple) for the first time today. Aspirated and air bubbles came out. Injection was smooth, but I felt the PIP almost immediately after the pin. Is it normal? Usually when I pin other muscles, PIP only happens 1 or 2 days after.

Pecs are sensitive areas. I tried it once and regretted it. I’ve definitely felt pip right away in other areas myself. Bad news is it tends to worsen when felt right away.

Regretted too right after the injection. The PIP feels very different from other areas too, like being stabbed in the chest with a knife. Gonna avoid chest for now.