Period at 3dpo on clomid???

Emily

So I’ve taken 3 rounds of clomid. Each time my period comes at 3dpo!! I am on my first round of femara now and THANKFULLY I am in 9dpo with no period yet! So it must have been the clomid...just wondering if anyone else has had this experience! Not sure why it would happen and I can’t find anything online about this happening to anyone!