Thankyou ladies!
Went to the clinic this avo, talked everything through with the nurse. She said we could try a stand-up aspiration (can't remember the name of it, durr), she would draw out quarter of a ml, I'd try to have a drink, then she'd draw out more until I was comfortable drinking again.
Sadly my port was playing bashful while I stood up, so we agreed to a standard lying down aspiration. We discussed whether 0.5ml or 1ml should be removed, but I've been so panicky and miserable we opted for the safe option of 1ml.
It's just as well, since there was quite a lot of pressure when she found the port and over half a ml squirted into the syringe of its own accord!
There was no issue drinking water afterwards, which was a HUGE relief!
I asked about how long to go back to liquids for, but the nurse told me to just have a couple of days on mushies, only go back to liquids if I was struggling. That was a big surprise - I was expecting 3 or 4 days on liquids.
I've since had a chai latte and a mug of tea with no issues at all - hurrah!
Such a relief, I can't tell you
I have my next fill booked for mid January and the nurse thinks we'll probably go for 0.25ml, go very slowly from now on.