wordpress site keeps failing…HELP

I have just started making my first wordpress site and am making a lot of changes to it and everytime I make a change I refresh the website on another tab… I keep doing this over and over as I have a lot of changes and customizations to make. After I have done this a lot of times I loose access to the site and admin dashboard and cant access it again for ages, I have deleted my browser history and flushed the DNS but still have to wait along time to be able to access the site or admin dashboard again. I know that it is a problem with my computers and not the site or connection because I have multiple computers and when it happens to one of them I check on another and I can access it until I again make too many changes and refreshes on that computer and the same thing happens.

Does anyone know how to fix this?

PS. when I cannot get access if I go to my site it either sais cannot be displayed or this domain was recently purchased from namecheap or just loads forever and does nothing….. and if I go to my admin sign in sometimes it sais cannot be displayed or it actually comes up but when I type in username and password and press enter it just loads for ages and does nothing…and I have also tried deleting cache in dashboard to try and prevent it but it doesent seem to do anything.