Was going to say what a ‘s..t’ start to your day Ruby, but I guess that would’ve been too ‘literal’!
I guess you’ve gone off to your appointment now. I really hope all goes well.
If you still have the blockage and a good ‘pump’ with something won’t flush it through, then G&T is right, it could be blocked, in the sewage pipe. After many blockages here over the years, OH bought some drain rods (not expensive ones like professional companies use) but good enough to shove down and clear the blockages further down into the sewage pipe (had to lift the drain cover).
After hearing about your probs, I wondered if you are putting things down it. I won’t elaborate. I don’t have periods anymore but have had to tell visiting girlfriends to use nappy sacks and the bin. As we have one toilet with a straight run under the kitchen floor. Can’t afford to have to dig that up. Since then, we’ve not had one blockage, and we use a few flushable loo wipes too, as well as tissue.