About 4 weeks ago I had low blood sugar 2.1 first day at 6:30pm which I fixed and got back to normal and 2nd day 3.3 at around 6:30pm which I got to normal as well my friend suggested I test my blood after telling her that I’ve had a constant headache for 3 months with many side symptoms at the time of testing my blood my hands were shaky which was why I tested it. I went to the doctors and she told me I’m very stressed ( I have been) and to stop testing my blood etc she ordered me for blood tests which all came back saying I was perfectly healthy. Today I almost went low again, it was 4.2 when I tested it ( bought my own moniter to moniter my blood sugar levels) I know 4.2 isn’t a low but I was shaky and I feel as though if I left it longer and didn’t eat it would have gone low again, it has been perfect ever since that 2nd day my friend tested it in the afternoon with her blood tester. I’m very confused with what is going on and my doctor didn’t help at all, can any one here help me out and explain why my body is doing this