Back from the vets. Jenny had a good examination around her opening and couldn't feel or see any stones. So good news there.
We talked about ovarian cysts, I asked about doing an ultrasound and she said that she may have some active cysts but they would probably be really small and would not come up on the ultrasound. To show up on the ultrasound she said she would have felt them. To be sure Thelly had an injection of Chorulon, which I think helps break them down.
The urine dip showed a little less blood then on Monday, so the septrin must be doing something!

It is still very chalky and gritty though.
We also decided to try Cartrophen so she had an injection of that to. Poor girl screamed the place down, it was awful to hear

I've just given them their veg and she is munching away now and possibly looks a little brighter.
The test will be when I get her out to give her her meds and some fluids, whether she squeaks or not when she does a pee. Fingers crossed, as Jenny really isn't sure what else we can do for her, but is encouraged that Thelma is still eating well.
Please everyone keep your fingers crossed that these injections have done some good, and she can have some respite from the pain.
Oh almost forgot she did some research about the vetergesic the injection only lasts in a piggie for 6hours, so a bit pointless. The oral version involves getting it right on the tongue and is apparently really hard to monitor how much they actually take in.
Thanks everyone for all your advice and support it has meant a lot x