Upgraded to https now dashboard behaving oddly

Hello All…
I am hoping someone can offer some suggestions of how best to proceed. I have an online store powered by wordpress (hosted by Dreampress) and woocommerce. In order to appear more professional I invested in a security certificate to make the site more secure but ever since making this change my wordpress install has been behaving very oddly. Among the problems I’ve experienced are…
1. When I hit update on a product I’ve amended, my dashboard disappears and I get sent to my sites page not found page, if I simply refresh the page I am returned to my product admin page with a note that my page has updated.
2. When I try to publish a new product page, I get a page that mixes my dashboard page and page not found page making the whole thing unreadable. Again a refresh once or twice and it eventually goes through as it should.
3. When adding related products to product variations the suggestion box that pops up with items that feature the letters I’ve typed just says loading failed. If I repeat the process three or four times it eventually works as it should.
4. When trying to remove an individual variation I get ‘things are happening’ swirling circle but then nothing. It just keeps spinning.
Unfortunately I am not terribly technically minded so I have no idea if this is an issue with wordpress and woocommerce, some setup issue I have created when adding the extra security, an issue with the installation made by Dreamhost or issues with my browser.
Is there anyway (by use of a plugin, or a debug type deal) that I can check the site automatically that will highlight any errors so I can at least start to move towards fixing things. While the issues don’t appear to have affected the frontend of the site, it has made adding new content very difficult.
Any suggestions, expressions of sympathy, hilarity emoticons much appreciated.