Thanks for the question.
First of all why do you think you have a dry socket? Have you been sucking through a straw or swishing vigorously?
Even if you do have a dry socket that does not mean you will end up with a heart infection. Heart infections are uncommon after dental work. We give antibiotics for a precautionary. You have been taking your antibiotics regularly and you started them pre-procedure. So there is no reason why I would think that you would get a heart infection.
If your pain is not getting any better or it's worse than you need to be seen.It's way to early to be thinking about a heart infection. If you remember last time you had dental work everything turned out just fine. There is no reason for me to believe this will be any different.