Ok. First, you need to leave this snake alone to acclimate. He’s only been with you for two weeks and you’ve attempted to feed every 3 days and tried to assist feed? Second, do NOT assist feed this animal. He’s not eating because he’s stressed out. If he has not taken a meal with you, wait a full 7 days before offering again, offer the same type of prey he was last eating , and do not handle for those 7 days. Two weeks is NOTHING for a snake. There is no need to think twice about it, much less try to force feed him.