Thanks for writing in.
I am a cardiologist and read your question with diligence.
Loprin is one foruth of over the counter aspirin
available and being consumed for centuries. It is perfectly safe during pregnancy
. Why do not you talk with the doctor who prescribed it? Your fears, (though justified are unfounded) will be allayed. You can also search the internet for side effects of aspirin, it has been termed as miracle drug and has been into its second century of use.
With Best Wishes.
Dr Anil Grover