I'm sorry to hear that you're in pain!
I can't say for sure why you're experiencing this pain, because I'm not a doctor and this is the internet, but if I had to bet, it would be general soreness from either not taking things slowly enough, not being aroused enough, not using lube, or some combination of the three. Pain is definitely not a normal response to intercourse - when the vulva/vagina/cervix respond with pain, they're signaling that something's not right. From Ow to Wow!: Demystifying Painful Intercourse
has a lot of good info about causes of pain either during or after intercourse.
If that's the case, in all likelihood the pain will go away in the next day or so. Usually it means that the tissues have been irritated or the muscles are sore, and things like time and rest are what help them heal and feel better. But if it gets any worse, doesn't go away in the next day or two, or is accompanied by any other symptoms (like burning when you pee, unusual discharge, or bleeding), definitely check in with a healthcare provider about it!