Learn Farsi: امروز سرم سنگین است.

The word for my is attached directly to the end of the word for head (sar). In Farsi, we often use short endings called enclitics instead of a full, separate word. Here, we add -am to sar to make saram (my head).

Could I say sar-e man instead of saram?

Yes, absolutely! You can use the separate pronoun man (I) connected to head by the ezafe sound, making sar-e man. However, using the short ending -am is much more common and natural in everyday spoken Farsi.

Does saram sangin ast mean my head literally weighs a lot?

While the literal translation is indeed my head is heavy, this is actually a common Farsi expression. People say this when they feel groggy, have a dull headache, feel dizzy, or are coming down with a cold.

Why is emruz (today) placed at the very beginning of the sentence?

In Farsi, words that tell us when something happens (time words like today, tomorrow, or yesterday) usually go at the very beginning of the sentence. Remember that the verb, which is ast (is) in this case, always stays at the very end.