If you are worried about
your immune system then you may want to get your blood levels of vitamin D measured. Vit D helps modulate your immune system. For example I have had only one cold in the last 5 years after raising my blood levels of D. Having adequate amount of vit D can only help you.
I don't have much experience with most meds including 6MP but I would be wary about
discontinuing it. Getting off a med can sometimes be worse than never taking it in the first place. So I defer to other members here when talking about
your meds.
You may want to search this forum about
LDN. Some have found it to be very effective with few side effects. I believe some have commented that it can be taken with or without other meds like 6MP but again I defer to the more experienced members of this forum.
www.youtube.com/watch?v=5p5nhzP2OaIwww.healingwell.com/community/default.aspx?f=38&m=2157045