ramaNYC,
Glad you are thinking about transdermal LDN. Yes, it would be a good idea to get full blood work up - to detect anything that might to be addressed, i.e. low B12, low Vit. D3, etc...
You can do LDN along with any other treatment you may be doing. The only contra-indications to LDN are: opiate pain killers and Alcohol.
As to why most doctors don't tell you about LDN, here's what I think:
It's too bad too many doctors are to set in their ways and not open minded to consider the LDN for their patients. But so many are ruled by the almighty buck, and the perks they get from Big Pharma for the big ticket $ items they prescribe is too big a lure for them.
Greed doesn't advance anyone's cause, except the one whose pockets are being filled.
LDN has helped so many people with so many different types of conditions - many auto-immune diseases, such as MS, Parkingson's, Lupus, etc...
I've read amazing accounts of some who are wheelchair bound with MS, and after a few months, can start walking with a walker, and then within a few more months with a cane.
I've also read some accounts of it putting breast cancer, prostate cancer, and even a stage 4 pancreatic cancer patient into remission.
If you think you have Candida issues, you should probably take care of it as well, but you needn't wait before starting the LDN. L-Glutamine does help with Candida suppression/eradication and so does Oregano Oil and GSE (grapefruit seed extract).
I sent you an email with the links to the products I use, as they don't link posts with links to products, even though I am not at all connected to any products in any way, shape, or form.
If you have any other questions, feel free to ask.
And I hope this helps.