anal tips

So last night my husband and I couldn't wait so we had some fun in the car . He played with my anus for a couple of minutes and my ass felt ready so we decide to go in with just my juices as lubrication . He starts putting the head in and I can't take the pain .as soon as we got home I use the restroom and wipe my behind and there's blood 😖  Is there a certain way to make it less painful beside lube if there's none in sight . Any position ? Or a specific type of lube ? Or something to do beforehand ?