I'm living with the consequences of my past drug abuse and my husband still hasn't figured it out
What do you mean, consequenses of your past drug abuse?
The symptoms of my drug abuse are mostly gone at the moment however every now and then I have symptoms that come back, and I haven't told my husband.
It's great that you're no longer abusing drugs. However, if you have symptoms that might be worrying to your husband, you should tell him about them. It is not good to keep things form your partner that might affect them, such as seeing a spouse with unexpected health problems.
I'm going to talk to my therapist and convince him that I am fine, so I do not have to tell him about any of this and I hope you understand that.
While I respect your wishes, I do think you should be honest with your husband and with your therapist. Being honest will allow both of them to help you through this.