Trans women are still women, regardless of what you may think
Trans women are biologically male. This is not what "we" think. It is not a matter of opinion. It is scientific fact.
When I give blood they have to test it in the females tester
No they don't. They do it as a courtesy.
I still have to have breast screening like any other women.
But not because you are a women, again a courtesy, or because you are deemed higher risk because of the cross sex hormones.
The only difference is I don’t have periods.
No. That is not the only difference. Every cell in your body is male.
Biological women are always biologically women. Female and male are at the most fundamental level determined by chromosomes. No female has male chromosomes and vice versa (excepting some rare disorders which are irrelevant here).
I have empathy yes but trans people do not care what you do whilst changing, regardless of being male or female, we just want to get changed
You have previously stated that you would feel uncomfortable in a changing room with males. This is exactly how most women feel. As transwomen are male they should also not be in women's changing rooms. They should understand that as they are male they make women feel uncomfortable. Women just want to get changed, without any males present no matter how they identify.
I don’t want to be treated like anything less than that because of something I’ve gone through in life.
No one here sees.you as lesser. As you are.biologcally male however there are some circumstances in which it is not appropriate for you to be "treated as a woman". Women are not lesser than men, or vice.versa. They are just different.