Baby aspirin

Lou

Hi 2 miscarriages in 8 months 😪 I’ve heard about baby aspirin does the doctor need to prescribe this or can I buy from chemist ? Also do I take when trying to conceive or once I’ve conceived he has referred me to a gyne but there is huge wait ? Any other tips plz ? Trying to conceive after miscarriage I’ve had bloods done today hoping there getting much lower