Walaykum salam ,
This is sad to hear sister, I'll definitely keep you in my dua's. May Allah strengthen your iman and expiate your sins through this illness. Ameen.
You may not be able to do hajj this year but be positive. There's also Ramadan habibty, umrah during Ramadan is equivalent to Hajj and since Ramadan is closer, I'd suggest you to plan Umrah this year for Ramadan.
As for any prophetic medicine, there's black seeds/nigella seeds (habasouda in arabic),
The Prophet Muhammad (peace be upon him) said on the authority of Abu Huraira to: "Use this black seed regularly, because it has a cure for every disease except death.” (Reported by Bukhari.)
Do you have any herbal stores near you? Here's an online store [link], although sometimes going to the shops and checking it out is better. There's also certain ways in taking the medicine that could help you more effectively. I've searched around and I found this:
Backache & other kinds of rheumatism
Mildly heat a small amount of Black Seed Oil and then stroke the rheumatic area intensely. A teaspoon of the oil should also be drunk three times daily.
Some more information,
What is more effective to use, the Black Seed herb or the Black Seed Oil?
The Prophet Muhammad (peace be upon him) stated, "Use this black seed regularly, because it has a cure for every disease except death.” (Reported by Bukhari.) He did not state to use the oil regularly so this can be used as evidence that the whole herb is what he was stating when he proclaimed this. Both are effective in their own standards. However, Black Seed oil is more concentrated than the herb itself. Many people prefer using the herb to the oil. Caution should be taken when using black seed oil due to the fact that many oil products are imported and may be adulterated or mixed with other oils. Some oils coming from the Middle East are extracted with heat and hexane, a petroleum by-product. Always use a product that is labeled as 100%, cold-pressed, solvent free, and packed and sealed by machine.
[from the site > http://www.alyusra.com/blackseed/
Be strong, Allah ma'aki. Despite the difficulty, don't leave your salah no matter what. We all have tests. Insha'Allah it will work out for you. May Allah, the Most Merciful, ease your illness. Ameen.