Website not loading fully, very slow when it does

Updated my theme, Child Agency Theme, to 2.0 and several plugin updates a couple weeks ago and now i can’t even try to figure out whats wrong because it just won’t load.
I have been told there are several url’s that are not secure, as my site is set for forced ssl. But these pages are not loading correctly and neither is my theme. All visitors are getting a security warning. I downloaded HTTPS plugin but can’t set it up. these are the url’s sent to me that are not secure…how do i use the https plugin to fix these?
https://vapelation.com/wp-content/themes/agency/style.css
https://vapelation.com/wp-content/plugins/woocommerce-product-bundles/assets/css/bundles-style.css
https://vapelation.com/wp-content/plugins/woocommerce/assets/css/woocommerce.css
https://vapelation.com/wp-content/plugins/genesis-responsive-slider/style.css

Neither are these Javascript libraries loading:

https://vapelation.com/wp-includes/js/jquery/jquery.js
https://vapelation.com/wp-includes/js/jquery/jquery-migrate.min.js

I wrote my hostserver who said my site is loading like lightening, but the theme is not loading and ultimate facebook is causing errors, but I don’t handle that particular plugin so I don’t know anything about it.

I’m new to WP and I don’t understand how to fix my website after hours of research. Could someone please help me out? I was also told i have “tons of javascript errors”, so be my guest! If you need further information, just ask. Thank you in advance for any help…as each moment that this is not handled is a sale i’m not getting.

https://vapelation.com

I think i should try to re-install my theme…then deactivate plugins, but I don’t really know.