I mostly self-treat. I cannot really recommend it to others. I worked as a diagnostician (we say trouble-shooter) in a large electronic factory for over 31 years. I got tired of doctors who had no clue so I went to the state university book store to buy some real medical books. I really thought it was illegal to buy such books. But, I walked into the medical section, picked out a couple books including a doctor's reference manual. I took them to the cash register woman, paid what she told me and walked out. That was nearly 40 years ago.
I started reading medical books. My latest is Guyton and Hall Physiology text book used in Medical schools in the USA, and translated to Spanish, in Mexican medical schools. An older version may cost $5 plus shipping. Medical books are not for the faint of heart. It takes years of study to begin to understand what they are saying. Every time anyone went to the doctor, I asked them what the doctor said, then looked it all up.
Now, I go years without going to a US doctor. The first time I have a problem, I need to ask then after that, I take care of it myself. In a nation where you can order a ton of illegal drugs, antibiotics are not a problem. In fact, you can legally buy them if you know where.
In 2015, one day I was unable to get out of bed without help. I called a person I know, one of the best doctors I know, and he told me what my problem was, SIBO, and how to deal with it, using probiotics and aspirin. I survived a thrombosis and 100% oxygen blocking pumonary embolism, as well as blood clots for days at a time, I well knew if I went to a doctor, I was doomed.
I will need to take probiotics (Sping Valley 50 billion from Walmart) for the rest of my life, but they are cheap compared to doctor visits. After 4 years, I am again feeling great (knock on woods

)
And, I am not at all worried about cancer (google for Warburg effect and Atkins diet) nor infarctions.
And, I am 77 years old so my life expectancy is nearly complete.
Let me say again I do not recommend this to anyone. It is my "thing" and I am happy with it. Remember, I put my pants on the same way doctors do: BOTH LEGS AT THE SAME TIME.