This is getting very off topic, but I don’t believe this is accurate for two reasons. First, the pharmaceutical regulator in the U.K. is the MHRA, which is an executive agency of the Department of Health and Social Care. The MHRA is distinct from the NHS.

Second, saying “the NHS was behind much of the covid policies” is misleading: the Government took decisions, with advice from experts including the Chief Medical Officer, Chief Scientific Advisor, SAGE, etc. While there was significant input from many different people - many of whom have NHS and/or academic roles - I don’t think saying that the NHS was behind the Covid policies is accurate.

To the OP: I’m sorry that you’re going through what must be a very stressful situation. Without getting bogged down in could have/should have (as cws says, this is the kind of mistake one only makes once), if I were in your shoes I would follow the advice given to speak to an appropriate local doctor and get a new supply of the relevant medication ASAP. This may entail speaking with insurance, etc. - but better safe than sorry.