Atenolol during pregnancy

My resting HR is roughly 160 and without my Atenolol I cant walk due to how much higher it gets with activity. My current doctor says it is fine to continue *if* I am pregnant, but all over the internet it says Atenolol isnt considered safe for a baby. Ive attempted to wean off to switch meds in the past and I am unable to function. ): Has anyone else taken a high dose of Atenolol during pregnancy? My last doctor told me it isnt safe, my current one says it is safe. Im so confused and worried.