I submitted an article to a journal last year in July. It took some months for it to be processed and peer reviewer to be assigned.
I received the first decision in March (major revisions). The article went through several rounds of revision. The last exchange I had with the journal editor was a month ago. The editor stated that they would go ahead with publishing the article. I was required to make one last small change after which my article would be sent to typesetting and proofreading.
I revised accordingly and emailed the editor.
Since then, radio silence. 10 days after I sent the latest version of the article, I emailed the editor asking whether it would be possible to receive an official letter of acceptance at this point as I needed it for a deadline at work (the deadline came and went). No response. It has been 20 days since then, and I have heard nothing.
I understand that the editor must be very busy, and I do not want to badger them.
However, I am getting extremely apprehensive given that the issue my article is supposed to appear in is this month's issue and that it usually isn't supposed to take longer than two weeks for typesetting and proofreading, yet I have not heard anything yet.
So, do I contact again with a polite question as to what is going on? Or do I just wait?