I went to a cafe after I had left Amar. I had just sat down when Emily walked in. After we had a coffee, we talked about my relationship with my ex-boyfriend Andy back in the USA. She did not know that I had got engaged to him that we had planned to get married I explained that we split up a few weeks before I came to the UK because he had cheated on me. I suppose I still love Andy, even though we had a terrible row when I found out he had lied to me. Anyway, by the time I left the cafe I had started to get worried. It was four o'clock Rob and I still hadn't arranged where to meet for our date tonight. And I couldn't phone him because I had left my cellphone in my room and I couldn't remember his number. When I got back, I found a text that Rob had sent me.
It had arrived earlier in the afternoon while I was out.
Here is my first question: Would have been possible to write "It arrived" instead of "It had arrived"? I ask, because it seems obvious that Rob arrived before she found the note ("while I was out") and she found the note after she was back home.