LuLu,
low dose aspirin is fine to take during pregnancy. I started taking it 2 months prior to conception for this pregnancy (81 mg daily). I also give myself injections of a blood thinner once a day. My baby is doing great and is on the larger side. I had 2 very late losses due to an unknown clotting disorder. All of my blood tests came back in the normal range but they found large clots in the placenta of my last pregnancy. I demanded the blood thinners from my docotor. He told my that aspirin alone would be the best way to start.