Thy wrath lieth hard upon me, and thou hast afflicted me with all thy waves. Selah.
Thy wrath lieth hard upon me - as a heavy burden (Psalms 38:3-4).
Thou hast afflicted (me) with all thy waves. Selah - the tumultuous billows of trouble and pain (Psalms 42:7). The word "afflicted" in the Hebrew precedes the "Selah," which is appended in order to draw attention to the word "afflicted" ('Innitha), which explains the title "Le-annoth." See introductory remarks: hence, "me" also is left to be supplied.