My Divi page is loading so slow from1 week. I don't know what to do.

Hello everyone.
From 1 week my website made in Divi started loading so slowly, that it takes about 1 minute to load my homepage. I must admit that my homepage is not perfectly optimized, but before it used to load in like 5 seconds, so it was not that bad.
Now, I totally do not know what caused the problem, it takes about 1 minute to load some of my pages (especially the homepage). What seems interesting, always when I load my homepage now, it is loading for that long time and no graphic elements are visible for one minute and it looks, like the page will fail to open or timeout. But after like 1 minute of loading, all layout appears very quickly, and page loads in 5 seconds (like it used to before - but after 1 minute of loading before).
My page is businessnes.com

It is probably worth mentioning that most of articles published on this page load normally, like they did before (without problems) - maybe it is because they have smaller size to load? I do not know.

I contacted with my hosting provider and checked my server and everything there seems to be right. My PHP is updated to 7.3.0. PHP memory limit is 128M and PHP post size limit is 64M

I deactivated all my plugins to check if it is caused by any of them, but the problem did not stop. I also cached my page using both caching plugin, and server caching, but it also didn't help.

I even reinstalled Wordpress and it also did not help.

What other things I can do? Have you heard about any problems with Divi like mine after last updetes? What can I do?

I will be extremely grateful for every answer. Thanks for the help in advance

 

To be precise, I want to add that when I load the homepage, the browser waits a very long time ("Waiting for businessnes.com" appears in the lower left corner). And in this way the browser waits for a minute, and then suddenly opens quickly in a few seconds.

So the problem is not specifically loading. The problem is that you have to wait a long time for the site to load.

Below picture of "waiting" information, which I talk about