Could The Pain In Legs Be Normal After Standing For Long Hours?

Hello I am a 19 year old guy who has recently started a new job at a supermarket. At the supermarket I work as a cashier and i do it from 8 am to 1pm then have a break and start again at 4pm until 8pm. The problem with this is that I do not have a chair and so towards the end of ethier of my shifts my legs hurt because i just stand still in one place for about 4 hours. During my break I fill rather tired and have to lie down, and I spend most of my break time to recuparate some strength. I have only been doing this for about 2 days but I plan to contuine to do this job for another 2 mouths.

Is this pain normal? Am I going to get used to it?

Thanks