No, people cannot read your mind. But they can make guesses about what is in your mind from observing what you do. Sometimes those guesses can be pretty accurate and sometimes they are very wrong. You can sometimes fool them by not showing much on the outside of what you are feeling on the inside.

And you can be scared of things that are not really something to be afraid of. Your brain may be sending Danger! Danger! Danger! signals that actually are memories of what happened years ago when you were small and could not figure out what was happening, how dangerous it really was. The very same neurons that activate when there is real danger could be activating when there is no longer any danger, if you like to think of it that way. Since the signals are almost the same, it can be very hard to tell what is really true. Your brain may be telling your adrenal gland, for instance, to send out adrenalin to prepare your body for battle when there is no external thing to battle. I know. I was on maximum alert for a long time, and it still comes back sometimes -- even when I am alone (except for the cats) in bed. How to tell whether the danger is there now or if it is just a memory? Very hard to do when they feel the same. I guess you have to look around you and see if you see any dangers, like when I am alone in bed, it is unlikely that anyone is really there to attack. Then you can say "I feel afraid but maybe it is just something my brain/body is telling me, and it might be mistaken".

Unfortunately mental health people do not always explain things very well to you, and sometimes try to shut you up instead of listening to your story of alarm. If they have not experienced it themselves they probably won't know how real it feels, and they may try to get you to just stop. This is not a good way to deal with the situation, because it makes you just more suspicious of their motives, harder to decide what is the truth. Hard hard hard. But you can get used to examining yourself and seeing what seems to be real danger and what seem to be signals of danger that may have come out of the past. The brain is not perfect, and sometimes malfunctions and sends you false signals!