Hi there, congrats on your twin pregnancy and hope the rest of your journey will be smooth! I’m in my 15th week and just took my first dose of Pfizer 2 days ago. Side effects were only sore arm, mild fatigue, and headache (but that could be due to the recent hot weather as well). No more side effects today and I’m feeling well :)
Mine is first pregnancy but not high risk though, fyi. All the best to you and take care!