Kate, certainly ask to see another doctor. Clinical depression is a very specific medical condition and is not treated lightly. However not all doctors are expert in everything and you need someone else to look at your circumstances. If it helps, write it all down, so you don't forget any symptoms when you go - you may be depressed but you need it clinically diagnosed. You may have severe anxiety too if you are scared to go out, and I understand that feeling. Is there a different doc in the practice you can go to, and say that you are still unwell and that nothing will lift you out of it? Unless your works policy is different, you can take up to seven days off sick by self-certifying but tbh, having been where you are many years ago - making yourself go to work is a good thing, it gives you something to focus on. Staying at home doesn't really help.