Help me please

Maria • I`m happily married, & I am a new mommy to a beautiful baby boy & with my new little girl. My life is now complete 💚💜
I had a miscarriage which I ended up having surgery on November of 2013. My husband and I have been trying to have baby since the ends of January when the doctor told us it was okay to have sex again. When is the right time to see a doctor about Fertility?