@LundiHvalursson Here's some information about culture shock and reverse culture shock. Although you have lived in the UK for school already, were you made aware that these two things can create a lot of anxiety for people who live and work abroad? StudentsAbroad.com - Study Abroad Handbook Worldwide: Reverse Culture Shock

I encourage you to read through both stages of culture shock to see where you identify yourself as. Maybe you are in between both stages. Homesickness is a symptom of reverse culture shock too. So everything you've been experiencing up to this point, living abroad is completely normal. When I lived and worked abroad in my 20s, the same happened to me that's happened to you.

I hope that link can help put everything into perspective for you. I think it is awesome that you want to do medical school in Italy.