Haven't talked about this much on the internets, but I'm currently taking CBD oil to deal with my chemo for stage 4 ovarian cancer. Just had my 3rd round out of 6. For about a week after each round, I feel weak and the surgical sites where they hacked out the tumors can hurt and twinge. I don't like taking pills if I don't have to, but my nurse recommended CBD oil and my doctor is very on board with marijuana products. For me, CBD definitely helps with the pain, neuropathy and weakness involved with chemo, but ymmv as to how it affects you personally. For me, it helps a lot, and I've heard others say it helps them too. I'm currently getting mine from
Sunsoil, which is way cheaper than buying it locally. The few times I've taken THC I haven't liked what it does to me - I think I have bad reactions to it sadly - but it's said it's more helpful to take a "whole plant" mix of THC/CBD. I have no idea if this is actually true or not.
My dad also had lymphoma, in which they did no surgery but only gave him chemo. His doctors told him "if you're going to get cancer, lymphoma is the one to get" because it's relatively easier to get rid of with chemo than many others, I guess? He's been free of it 5+ years now after 6 rounds of chemo and radiation therapies. However, his blood cell counts are still low, and I anticipate mine will probably be too after chemo, though I'm younger than he is so idk. There is a shot you can get called Nulasta that forces your bones to produce more cells, but can cause bone pain. He had it and I might have to have it too. I don't know if doctors are into administering that shot after chemo, but they often order it during for patients who need a boost just to take their next chemo (which might be what I'm looking at next round).
Sorry I can't help very much with your specific problems, but you're definitely not alone with the worries about the future.