Hi there and welcome to the forum. Thank you for your question but are sorry you are suffering dizziness. It sounds like you are saying that you have been diagnosed with some conditions but are currently not treating them, correct? We're here to help. Is there a reason you aren't? Issues with access to care, financial concerns, anxiety over treating them and overwhelmed? We'll try to help. Let us know what is going on with that.
Dizziness can be caused by many things. Here is a general article on this. https://www.webmd.com/brain/dizziness-vertigo Underlying health conditions is one reason people experience dizziness. Dizziness is very uncomfortable and can lead to falls which can lead to further injury so we are glad you are asking about this for yourself.
Your personal situation that you tell us of here could cause the dizziness. Untreated high blood sugar indeed leads to dizziness for some. High blood sugar can make you dizzy because of the physiologic response to high glucose levels. Many with this situation are also dehydrated which can lead to dizziness as well. https://www.medicinenet.com/hyperglycemia/article.htm
Untreated MS could also certainly cause dizziness. https://www.healthline.com/health/multiple-sclerosis/dizziness-vertigo It's a common symptom.
With your health conditions and this symptom, it's really best to see your doctor. We can talk further about this and are here to support you.