Ali... this sounds exactly like me too! Right down to the fact I'm 7 months pregnant too!
My son is 16.5 months...

We moved into a new house... and every night he has woken between 4-5am.
His molars are coming through... you can see two of them breaking through.

Last night I put some bonjella on his dummy, and he actually slept right through. mind you... he struggled to go to sleep - and didn't go down until 9.30-10pm.

To make it worse... I'm trying to unpack boxes, renovate our kitchen & Shaun woke up with gastro today. been spewing all day & can't keep water down

I hope for all of us that this stage passes soon. I need all the sleep I can get!