Blood during first time sex. Vagina still hurts hours later. Normal right? Just tear in hymen? I masturbated

Could be. Yes , could be the hymen tear. Should be small amount.
Here are some ... Despite the startling symptoms after sex or masturbation, what you experienced and observed could be "normal" consequence of sex-related acts - physical or chemical. You may wait and see as long as the symptoms are fading away slowly but surely. Meanwhile, avoid repeating potential culprits if identifiable through your experience. Of course, seek pro-evaluation and counseling if still in doubt.