Hello love and happiness,
I think you already had some great advice on your TSH through your previous post. Have you made another appointment with your GP? You need to see them again and get your numbers of free T4 and free T3.
Other than that, your doctor should talk to you about high erythrocytes. I think the the report might be talking about ESR - Erythrocytes sedimentation rate - which is marker of inflammation. If there is any inflammation in the body, it goes up. Doctor should investigate source of your inflammation. Your symptoms may be able to help find it.
Your MCV and MCHC are below range which is likely caused by your thalassemia trait. However, there is still a possibility that you may be iron deficient at the same time. To rule out, iron deficiency anaemia, ask your doctor to do a full iron panel as well as ferritin level.
Without knowing the results of these tests, you should not take iron supplements. What is your Hb?
With low MCV and MCHC, doctors blindly prescribe iron supplements which is not very good for someone with thalassemia trait. More investigation is needed in terms of iron and ferritin as I said before.