Hi zkzameer8,
what else you expected when you shoved your penis hard inside her anal hole, a smooth entry? but i think you are grown enough to understand that anal hole will not be as stretchable as vagina, so you need to prepare it well before you can have penetrative sex. Ideally you should have used a lot of lubricant or atleast oil to create enough lubrication. Now what is done is done, it seems you have created few lacerations in her anal passage, which will take time to heal, & rest assured she might even refuse normal sex with you. The physical pain will subside over a period of a day or two but the mental pain & loss of faith in you will last forever. The least you can do is make her as comfortable as you can may be ask her to take rest for a day or two, don’t make her bend too much, some people recommend ice therapy after anal sex it may help.