IUI and progesterone question

Kylie

Alright so I had my IUI 14 days ago, it was our first! We did the trigger shot, letrozole and vaginal progesterone. My question is l of course got a negative home pregnancy test today at 14 DPO. Am I completely out? They don’t do blood work, just say if the home pregnancy is negative to stop the vaginal progesterone. So when I do is it 100% that I will start and we will be out? Thanks in advance!!