I got my lip pierced 3 months ago and i took it out for less than 24 hours and cant get it back in i dont kno if they are slanted or go it straight or if is closed please help it the bottom?

Looks like you will need to go see your piercer and have the jewellery put back in with an insertion taper, trying to put the jewellery in now will be very difficult and will damage the piercing.