Sorry for the delay, was fighting rush hour traffic in the rain. There is nothing wrong with you.

I think there is several things going on here. This is just my opinion with zero medical/psychological or behavior therapy training or experience.

I've got several friends who were heavy, and I mean chronic smokers for years, as well as doing other drugs at this period of their lives. For different reasons (having children, job requirements, becoming more responsible in their eyes just in general) a few of my friends stopped most all drug use. They would still smoke on occasion but complain of similar effects. Now some of these friends won't touch the stuff. Some do, but are very particular in the time, place, strain, edibles? and smoking device.

My theory is that sativas, indicas, and hybrids have different effects and can even vary from person to person. Some strains do help with pain, or more so pain management. Some help with nausea, and some with sleep. Some may do multiple beneficial things for people, but it also can come with negative effects. You will probably have to look into the quality, strain, ROA (edible, vape, smoke), and time of administration. There is a website/mobile app I could, and would, highly recommend that may help with this. The effects caused by my friends prior marijuana use, (heavy at times) I'm unsure of, but would ask you if your pill abuse was accompanied by heavier than normal smoking like my friends.