JJ reading all that my heart really went out to you. I've had to deal with a *lot* of dental pain over the last couple of years for several reasons, and I think it's hard to deal with not only because it's strong pain but also because it's so close to where you're trying to think and function But I'm still not convinced there's nothing more that can be done. I think you need to keep asking questions until you get a solution. For example you could ask at the Dental hospital whether it's possible to be referred on to a specialist in a tertiary hospital where they may have facilities to help you sooner.

FWIW when I was dealing with the pain I had, both the oral surgeons and the endodontist I saw told me the most effective pain relief for the majority of dental pain is nurofen + panadol (apparently this is a newer recommendation) so I'm surprised no one has mentioned this. Can you take nurofen during pregnancy? If so, worth talking to your dr/dentist about it, because adding nurofen could mean you need a lot less of everything else, and can save the strong codeine meds for occasional breakthrough pain. Also, do they have you on any antibiotic treatment for the abcess? My endo explained that hot food or drinks can set off that severe pain because the decay lets off gas which is trapped in there but it expands with the heat pressing on the nerves. Also, since the pain seems to be strong early in the morning, is it possible that you're grinding while you're asleep and that's making it worse? Maybe wearing a mouth guard overnight might help with that?