Started a new job 3 weeks ago. It is a complete change in industry and I'm struggling. I was very experienced in my previous job, had the qualifications and 16 years experience. I was also only working two days a week but new job is five days. I'm really not enjoying working more hours (who does!) But I'm also missing my previous job and not sure I'm going to be as good at the new job/enjoy it as much. Do I give it longer before deciding to pack it in?