Body Pain

We're all stumbling around blindly, I think we just have to get used to the feeling of confusion and continue to grow.

Also your dreams will tell you what is going on. If possible remember them and work through them.

Sounds like your grandmother is watching over you and helping you. She may be protecting you and giving you the tools to help you. Meditate and polish your intuition. See a dr. If anything also ask for healing it sounds like that may be something, maybe reincarnation?
Mos def clear the energies with Sage.

I'm experiencing similar things.

If you're experiencing body pain, you may wish to begin by getting a checkup from your doctor. This is just in case there may be a physical condition weakening your natural defenses. Afterwards, you may wish to seek out a religious priest or wiseman or natural healer, and speak to them for more advice.

Having dreams where you can't move may be a form of sleep paralysis. When I was going though a difficult relationship, all the negative energy at home affected me and I was getting waking dreams where someone/something was pressing down on my chest. I freed myself from the unhappy situation, saw a doctor and took up meditation/yoga and I've not had an episode for years. You can get help for this ailment.
Https://www.webmd.com/sleep-disorders/guide/sleep-paralysis#1
Https://www.livescience.com/50876-sleep-paralysis.html

I've never really tried crystals but there's plenty of information online to find out more about them. You may also benefit from some kind of cleansing/shielding at home to protect your home environment. There are many methods - choose one that suits you. One way is burning sage, followed by sandalwood incense; yang must be balanced by the yin element to keep the energies in harmony.

Is your grandmother or another relative still around to ask for information on your family history? My paternal grandparents, aunts, uncles, cousins and myself all saw spirits or have experienced strange phenomena at some point in time. If you have inherited powers and abilities from your grandmother, you must not fear or give in to fear. You may feel uncertain because it is still new and unknown. But it doesn't have to be "bad". What matters is what you choose to do with it. Be gentle and patient with yourself. Baby steps first!