Shannon, thank you so much for the tips. I am going to copy, paste, and print it for my next measure.
Here is what I did:
The fat track gold is for measuring oneself in three sites: arm, waist, and thigh. For arms, I flexed and grabbed the skin with with the caliper because, obviously I can't use the other hand to grab it. So I let the legs of the caliper "slide" while holding them tight until the skinfold was grabbed by the legs of the caliper.
One thing I noticed with the Fat Track Gold is that you have to close the measuring legs tightly, otherwise it will overestimate the bf%. The looser you hold them, the greater the %.
For the waist I used the illiac crest, above the hip bone, in the front. That was pretty obvious that it was correct, because it kept coming the same: 1 mm. (But the front part of the waist is another story; it looks thicker, and probably would have gave me a higher measurement.)
For the thigh I used my left thigh because in the right was difficult. I used the inside of the thigh, because that is were my skin can be grabbed. I put my leg straight and flexed the foot.
For all three points, I didn't use a measuring tape to find them, but I calculated using key points in my body. Not to brag, and I know this is hard to believe, but I have very good visual memory and can remember exact or almost exact points in space, distances, etc.
I forgot to say that my menstrual period hasn't gone, but it has had a considerable reduction: From six to seven days that it used to be, to about three to four days.