81mg Baby Aspirin TTC

So I've been doing a lot of research, and I've been seeing positive results from taking baby aspirin to prevent a MC. I started taking 81mg baby Aspirin CD1 once in the morning and before bed. In the morning I take my prenatal and Vitamin D(I'm vitamin d deficient). Tomorrow is CD 9 and I worry that I should have only taken the aspirin once a day. This will be my fertile week and I plan to have an IUI this week. Any advice?