Completely normal.
Sometimes it sounds odd, but more often than not you have to document an absence of abnormality. When you document the normal bit it always sounds odd.
For example. Appeared appropriately dressed, appeared appropriately kempt
This seems odd but it tells you there's an absence of some things
Take someone on an antidepressant for example.
Some people when they are deeply depressed, are unable to dress appropriately. They might wear winter clothes in the summer as a cover all. It might be really clear that they haven't washed in some days.
If the next appointment they come in looking more kempt, it might be an early sign that the antidepressant is working.
Some antidepressants can tip people into mania. People in mania can completely change the way they are dressed (usually inappropriately for the weather, or bright colours for example). Your documenting this didn't happen by documenting things that don't seem note worthy
It can be really helpful to document a baseline. I have a patient who dresses in a way that's a bit eye catching, she also speaks quickly. It's helpful to document wearing striking makeup is normal for her, and her speech is usually fast, otherwise it can be mistaken for the first signs of mania.
Make up on women can be a really good indicator to. If you think of some women in your life, it's likely you could guess how they are feeling via make up. For some women, if they are wearing no make up (when they usually always wear make up) it can be a sign things are really a struggle. For me, I never wear make up so my baseline is make up less, I'm also usually fairly unkempt (lots of animals!) So my baseline would be a sign someone else was struggling.
It's often hard in depression in particular to get objective views about things. When I'm deep in it, I can find it hard to see progress or decline, I feel like I've always felt like this but others can usually see me lifting or lowering before I can.
Obvious we should always be asking people how they feel first of all and taking their answer straight out, but it's not uncommon for people to consistently mark themselves as a 3 each week, when they look like they've taken a massive dive for example.
Masking happens in depression all the time. People will tell you they feel better than they do (and this is a real worry) so it's helpful to have outside markers.
Of course they are very subjective, just like the rating scales. Sometimes people will deliberately dress up for Dr's appointments, some people will wear make up even though things are completely awful. However it usually does confirm they aren't catatonic, or so low in energy they can't even do that. We shouldn't base everything of any one measure. Everything in mental health is a "might be", its usually a collection of signs that point you in a direction
In your case think of as you answering the phone as you recording high pulse. If you answer the phone in a tone that's only slightly normal for everyone else, it might be a sign that you've dipped significantly. If you normally record a high pulse, and your pulse is lower than average at next check, the gp will know its a significant drop for you even if its in normal parameters for other people .