I’m sorry to hear about this Carcal1!
There are three things I’d recommend here:
1. Contact your hosting provider immediately, and report this issue to them. There could be a server-side issue that they can help with, and/or they might have good advice about what files/plugins on your site are causing the issues specifically.
2. Run through our complete set of troubleshooting steps here, with one modification → https://theeventscalendar.com/knowledgebase/testing-for-conflicts/
The “one modification” being that after each step, you wait 20-30 minutes or so to see if your site goes down again.
This process is hugely important, and in the context of this issue, might save you a ton of time and money. Because if your hosting provider’s support isn’t very fruitful, then this step might reveal what specific code on your site is causing this. So if you find out that e.g. your just-updated theme is the culprit, you can contact their support before paying someone and see if they have a solution first.
3. Finally, paid support. If you’re interested in hiring someone, we have a list of highly-rated developers here → http://m.tri.be/18k1
I hope that helps!
Best of luck with your site,
George