Which type of vax is Astra-Zeneca? If it is a modified CCP Virus, that could explain the symptoms. The Frankenvirus itself has a galaxy of different presentations in its victims, and I figure some of those could carry over in a vaccine made from it.
Adenovirus vaccine similar to J&J. The brain hemorrhage that she suffered is an adverse event that many countries have investigated and because of those events (blood clots/platelet issues/bleed outs) either eliminated using those vaxes or issued warnings on them.
Personally if I were you and had palpitations that continued after any of the vaxes I would definitely have it checked out even if only for peace of mind. I would also treat any headaches that linger the same way.
Hopefully your doctor/s can give you a clean bill of health or treatment if necessary