Baby/Half Marathon Question

I have been using ovulation tests for the first time this month since I miscarried and had a D&C back in October.  I got a surge, so my husband and I definitely did the deed.  We have a half marathon on Saturday.  If We are lucky enough to have made a baby, is it a bad idea for me to run the half marathon?  I've been doing Pure Barre classes and/or running 3-5 times a week since the D&C.  Thanks for any suggestions!