I had something similar happen to me I was trying to pick something up and forgot to support his head and felt the same way hun! I felt so bad I cried my eyes out and watched him like a hawk for a while after! But After reading up and watching a million videos on it , its really sad but for a baby to get SBS its takes very violent shaking! I promise baby will be fine, and you are doing a great job mama don’t beat yourself up! If you are really concerned message your pediatrician or take baby in to get checked out!
I promise you he is fine ! For a baby to have shaken baby syndrome it has to be intentional ! Hard shaking to wear the brain is hitting the skull .. I’m a pediatric nurse and have seen it all trust me you’re not going to hurt your baby by accident … babies seem fragile but they are alot harder to harm than you think!
If you're concerned, it's probably best to take him to be checked by a medical professional, the earlier he's seen if you suspect it, the better. I'm so sorry you're going through this mama 💕 Baby's are pretty resilient though and can handle bouncing and things and I think it's very difficult to create enough force to cause shaken baby syndrome without actually shaking the baby. Sending love 💖