i die before ive even spawned into the nether

So whenever I try and spawn into the nether I die before the loading screen even goes away because mobs spawn in excess all around it before I am even able to move around. the last three worlds I've started have had this issue. while the loading screen is up, on the world I'm playing on now, skeletons surround the portal and kill me before I even get to see what's going on. I can hear the damage I'm taking, the skeletons walking around, the arrows being fired but because the game hasn't even loaded yet I can't do anything. I can't move, I can't jump, i cant even see anything other than the loading screen and when I finally load into the nether i have a death message and that's that. r