The Sleep Regression Struggle is so real!

I guess I got spoiled because my son used to sleep from about 9pm until 9 sometimes 10am. He will be 7 months on the 28th and for the last week or so has woke up at 4am every single morning! It then takes me an hour to get him to calm back down and go to sleep. I literally fell asleep standing my his bed because he screams when I try to leave the room. Hoping this all ends soon! Even though I am a SAHM, I do have to function during the day and napping is obviously not always an option with an infant!