I have heard that you get really sick when you get this vaccine?
It appears that people who get the COVID vaccines are more likely to get some mild flu-like symptoms: sore arm, muscle aches, fatigue, GI discomfort, etc. This appears to happen a bit more with this vaccine than with (for example) the flu vaccine; and it appears to be more common after the second dose of the vaccine, and can last up to 24–36 hours.
But please remember: this is a GOOD thing! It means your body is responding to the vaccine and building up the defense you need to protect you from COVID! (Think of it like working out — you have to get a little sore to build up that muscle!)
It is absolutely fine to take Tylenol or ibuprofen (Motrin, Advil) to treat these symptoms if they occur; but it is currently NOT recommended to take those medications to prevent these symptoms before they start because it is unclear at this time if they will interfere with the antibody response and vaccine effectiveness.
And don’t worry if you don’t have these symptoms — some people do, some people do not!