What Are We Being Treated These Days Are Being Overdosed

What are we being treated these days are being overdosed to get side effects
You go to your doctor you trust them to treat but what you get prescribed make me fall in tears. We never given chance to express our selves. Because
Doctors have no time. I have just finished a course of treatment doxycycline 100mgs. Which cause me a lot of side effect on my side shortness of breath. .eye sight raised my blood pressure and causing me pulpation.having explained all that at my go practice I fell so unwell when I had a tetanus booster. Went so my gp
As was very unwell since good Friday my arm went so swollen.burning stinging and having sort of other side effect high temperature.
Went to my go having explained to me all that then she prescribed flucloxacillin which is in the same family. Have taken 2 capsules of this and have severe side effects. My legs locks. I get shooting headaches and my blood pressure gone so high.. So now have lost trust in what doctors prescribe to us . And Ilam scared doctors now..