Regarding the bright yellow urine...
Do you take B Complex supplements? They contain vitamin B2, also known as Riboflavin.
Taking Riboflavin gives people bright yellow urine - it can be practically fluorescent sometimes, and it is totally harmless.
When doing clear outs prior to endoscopy, colonoscopy, or flexible sigmoidoscopy, before starting the laxatives put a generous layer of barrier ointment all over the areas of your bum which will be affected. And every time you go put more on. The one I've used is one I bought from Boots called Metanium Barrier Ointment. This is what I bought, and it is obviously available from ASDA as well :
It is also important that you drink loads of water before, during and after the process until you have to stop. Also eat a low residue diet for 2 or 3 days before the clear out.
Hospitals are using the cheapest stuff possible for clearing people out these days and I've found it very slow and not very thorough. The first few times I had to clear myself out they were very effective and thorough. But over the years the procedure and the laxative has changed and it simply doesn't get you as empty as it used to.
It is possible to buy things to help get the process going e.g. Picolax sachets are good, but you can only buy them from pharmacies where the pharmacist is obliging.
Another very effective laxative is Dulcolax Pico Liquid which I've also got from a pharmacy :
If you are certain you are anaemic then you can treat yourself. You can also test yourself privately with finger-prick testing. Some links :
What the NHS prescribes , described here, and follow the links in the sub-sections :
The iron tablets the NHS prescribes can be bought without prescription from pharmacies and online. Some examples :
There are several brands of ferrous bisglycinate available.
What you need to be aware of with any iron supplement is the iron content. For example, ferrous fumarate 210mg has 69mg of pure iron per tablet. You can take 1 tablet, up to 3 times a day. This would give you 207mg of pure iron per day, and people should generally consider that to be the maximum.
To test your iron levels you can get a finger-prick test done privately :
If you supplement iron it is essential to test iron fairly regularly. Too much iron is poisonous.
When you test, post the results and reference ranges into a new post and ask for feedback from the members.
I had to treat and test my own anaemia. I gave up waiting for doctors to care. It took nearly two years for my levels to reach mid-range. But what a huge improvement it made to my strength and health. I've never regretted doing it, and I still take a maintenance dose of iron to maintain my optimal levels when I need to.