Most universities have minimum GCSE requirements - you meet these for some medical schools. Some also rank applicants by GCSEs and you would have to avoid all of those. You will be limited in which you can realistically apply for, but it is still possible that you could successfully apply for medicine. However, you would need to reflect on why you didn’t do so well in your GCSEs. Most people who get relatively lower GCSEs don’t go on to get A* in A level; you will need to up your game for A levels to achieve this.
On the other hand your GCSEs are very reasonable for a range of other courses. You should spend some time considering what other options there may be/what other careers may interest you. Some people may suggest graduate entry medicine if you struggle to get in now (eg if your A levels aren’t sufficient). Don’t think about doing another degree in any subject that does not interest you or you would not be happy to pursue a career in as gem is far more competitive and the vast majority are unsuccessful.