They are very weird readings and would indicate very low (worryingly low) blood pressure which would be making you very sleepy. Contact your doctor as a matter of urgency or phone a drop-in centre or similar place for advice. Ask if you may stop taking the medication without danger before risking it.
Home machines are often quite unreliable unless used in the correct way. I can't believe the reading with 35 at all.
NB: A 20 year old might have 120/80 as normal blood pressure
A 50 year old might have it raised to 130/85
but at your age once the larger figure goes to 150 or more on a regular basis they will say you ought to try to lower the pressure .
A friend of mine got dangerously low BP
from one of the drugs and an elderly reative had it go too low (drug was co-tenidone). They were both incredibly sleepy.
They started me on Ramipril
and it made me feel vague and not really alert all the time. Then they put me on Candsesartan which has turned out to be OK.
Add: From the info in your update about not taking any meds yet, it would appear that you do not need to take medicine to lower your blood pressure.
If the readings are generally correct then for some reason your BP is often too low and making you sleepy. I've included a link from the NHS for your information.
Good luck in getting your doctor to understand that you need to be helped to return to normal levels. What they need to do first is to give you a monitor that you can wear which will take a series of readings (our NHS doctors often lend them out.)