Those are pretty sensitive. What was the brand of the other test? One of the side effects of nexplanon is missed periods so that could be it. Probably a good idea to visit your OBGYN, though.
@brittanystewart304, Blue dyes aren’t very reliable and are easy to misinterpret. The threshold for that one is higher than the FRER. The equate ones are 25miu/hcg and the FRER is 7. If you are pregnant then the FRER would pick it up.