I really feel you on this, a whole night of jaw pain with work in the morning sounds absolutely exhausting and I hope you managed to get some rest after. TMJ during pregnancy can sometimes flare up due to all the changes our bodies go through, so you are definitely not alone in this. Since you are pregnant and the pain was quite intense and prolonged, it would be good to bring this up with your gynae or a doctor soon, just so they can advise you on what is safe to use for relief at your stage. Please do not just push through on your own, getting proper guidance will help you manage it better if it comes back.