This answer is more likely to be an assumption, as I'm neither a specialist in the Order of tanzil nor could I find a specific Question on the topic so far. But I could find some links giving a certain order of tanzil (revelation) with complete Suwar/Surahs. AFAIK this order may differ when it comes to Verses, so maybe a Verse of Surah A has been revealed ...
The prohibition on eating dead animal meat is referenced to four surah's in Quran, which you also mentioned in the Question. They are
Al Baqarah (2:173)
Al Maidah (5:4)
Al An'aam (6:145)
Al Nahl (16 :115)
can be confirmed here
Now the question should be, which surah was descended first. As you can see here,
The list shows only Surah Al-An'aam and Al-...
I think to your concern I could find half of an answer because I still have no clue about the order of surat al-Qalam. There have been two periods of silence.
After the first period of silence which was right after the first revelation of surat Iqra' (al-'alaq). And this period ended by the revelation of some verses of surat al-Mudathir, as stated in sahih ...
An-Nisa (04:03) was a general injunction and was revealed after the Battle of Uhuh. Due to seventy casualties, the issue of fostering the orphans was risen. The Qur'an suggested the Muslims to marry their mothers to solve this issue. After its revelation the Prophet married three women:
Zaynab bint Khuzayma
The husbands of both were martyred in the ...