Thick penis. Painful sex

I tried having sex for the first time with this guy and his penis is wider then an iPhone 5S. He put the tip in and I could of screamed of pain, he waited a moment then tried putting more of it in. I couldn't handle the pain of it so we resulted in 69. I really enjoyed that. But later that day when he ate me out again, he used fingers as well and I was too sore to handle it.