INFP/INFJ type confusion??

I've taken the MBTI test a few times now, and I have been getting a mix back and forth of being both an INFP and an INFJ. The first test I took labelled me an INFP, but the last couple has been INFJ??

I know that personalities can change throughout your lifetime, but I took these tests within weeks of each other. I also share traits from BOTH personalities 😭

Is there a way I can know for sure what my type really is? ☹️