How to get prescribed

I suffer from severe obstructive sleep apnea and suffer from chronic daytime fatigue. I’m prescribed 50mg adderall but wanting to see if modafinil works better to wake me up and function. Would I get in trouble if I don’t disclose my adderall prescription to a new provider? I was denied by two places who prescribe it because of the adderall script. I am not planning on taking my adderall on the days I take the modafinil.