Help Secure a Rollator Walker for Mobility

As of recently, my ability to walk has rapidly declined. Just getting from one end of the room to the other feels like a hike. The stairs are a mountain I have to go up and down every day. I've seen multiple docotrs and gone to the hosptial and urgent care but no one knows what is wrong with me yet. I am most likely suffering from POTS, something that causes many symptoms such as.chronic fatigue, light headnees, weak muscles, exercise intolerance, heart palpitations, brain fog, confusion and so much more. These are things I deal with on a daily basis. I'm currently using this wooden walking stick to get around. While it is extremely helpful, this is not the mobility aid most suited for me. A rollator walker would help me go outside on walks, get around the house, and would help with my chronic fatigue.