Not only everything you mentioned in your post, but another little understood part of the pill is that it is not exactly fool proof either. For example, if you take anti-biotics, you can get pregnant even though taking the pill. ANd what people in general don’t realize is there is only about a 10% chance in any given month of becoming pregnant. So what it really does is cut that 10% chance down by 98%. The drug makers don’t want you to know that it isn’t really worth screwing up your body chemistry to take the thing. I took it for awhile when I was first married and had to stop because it would give me raging migraines for a week at a time....so bad that I would be vomiting and dizzy. Totally not worth it. And yet, even after I went off it, my husband and I managed not to get pregnant until such time as we wanted to.
I took the pill for a very short time and had the same reaction. It would give me a headache so bad I thought my head was going to explode.
My wife and I have 3 beautiful daughters gifted to us in the span of 3 years. She was on the pill for 2 of them.