And that may be where we're just not connecting. 30 years? Oral Roberts use to say (and I agree) that "Sometimes, God heals through medicine.") He did in the Bible and I believe He does so now.
But you see, in your post, I read a little condemnation being directed at yourself because you are not healed. Like, "Well, its not Gods fault, so it must be miine". You are, and I mean this with respect, placing the blame for your lack of healing on yourself. That makes "guilt" the under lying factor in your sickness. I read this in God's Word:
Psa 84:11 For the LORD God [is] a sun and shield: the LORD will give grace and glory: no good [thing] will he withhold from them that walk uprightly.
Maybe, just maybe, God has provided your healing, but you fail to recognize the means through which He provides it.