Though it is unclear if this was a true suicide attempt or just a miscalculation on Poe's part, it did not lead to Poe's death a year later.
You'll have to read the story to see how that worked out.
Poe returned to Baltimore where he obtained a license to marry his cousin Virginia on September 22, 1835, though it is unknown if they were married at that time.
His story has not been confirmed, and some details which he gave to the press are factually inaccurate.