I actually don’t think it’s much of a big deal.
If it was me, I’d have rung the surgery within a week of having had the blood test to find out the results, as we’re told to do, and the results team would tell me what to do next ie. doctor wants to speak to you, blood test was fine, you need another test, etc.
Secondly, if I’d been given some different tablets when I picked up my prescription, first thing I’d do is ring the surgery to ask why, what are they for, and get a telephone appointment with the doctor.
Easy peasy.