Aspirin helps to thin your blood, most likely your doctor has prescribed it if they believe you have a blood clotting issue as that may be why you have experienced your losses. If your doctor has told you to take aspirin then follow the required dose and instructions and stop taking it when your doctor says so. Good luck
Each doctor has their own opinion about everything. One example coule be wine. Some doctors say a glass of wine occasionally during pregnancy is good for you. Others will say to obtain from all alcohol during the pregnancy. It all depends on your comfort level and whether or not you trust your doctor. Do your research and go with your gut. Personally, I don't think that occasional baby aspirin would do any harm. I was perscribed it during my last pregnancy and had a healthy strong pregnancy that resulted in my youngest beautiful baby boy