Hello I Wonder If You Can Help I Went To

Hello I wonder if you can help I went to the Terrence Higgins trust for HIV RapidTest they done two tests as there was a very faint broken red one on my tests.They done a second test this very thing broken line appeared in the same place as the first test and have now sent my blood off for testing. Is this something that happens as they said they've not seen this before I'm worried.