Blinks orange and then blinks green then repeats

Hello. My modem started blinking orange and green lights last night. It’ll blink orange for a few minutes and then it’ll blink green for a few minutes and repeat. I took my modem to the Xfinity store to swap it out because I thought that might be the issue but this new modem is doing the same thing. I can’t connect to internet at all. It’s done this once before and corrected itself after about 36 hours and made me setup a whole new home network. I’m trying to avoid having to have a tech come out. Please let me know if you can help