Had my booster shot a couple of weeks ago when I was 25 weeks. Now I'm in the 3rd trimester, so far so good, don't feel any different other than arm pain for 1-2 days. Baby is kicking and still active. Pretty much the same as my 1st and 2nd doses.
Took mine at 33weeks. All 3 Pfizer. Didn’t feel much of side effects. Try to do earlier, cause mine was cutting a bit close