You're half a vampire. No, you weren't bitten, you were born. Your father was a vampire, your mother - any humanoid race.
Your armor class automatically increases to 16
STR + 2
DEX + 2
WIS - 1
You develop damage resistance to necrotic; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks at level 5
Add Darkvision
You gain the following vampire abilities: (from vampire stat block) -
Shapechanger: If the vampire isn’t in sunlight or running water, it can use its action to polymorph into a Tiny bat- While in batform, the vampire can’t speak, its walking speed is 5 feet, and it has a flying speed of 30 feet. Its statistics, other than its size and speed, are unchanged. Anything it is wearing transforms with it, but nothing it is carrying does. It reverts to its true form if it dies.
Stake to the Heart. If a piercing weapon made of wood is driven into the vampire’s heart while the vampire is incapacitated in its resting place, the vampire is paralyzed until the stake is removed.
Bite. (Bat or Vampire Form Only). Melee Weapon Attack: +9 to hit, reach 5 ft., one willing creature, or a creature that is grappled by the vampire, incapacitated, or restrained. Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. A humanoid slain in this way and then buried in the ground rises the following night as a vampire spawn under the vampire’s control.