We're very sorry to hear about the trouble collecting the blood sample.
Make sure you follow the blood sample tips and tricks which were emailed to you, and also be sure to relax, take your time, and follow the helpful guidelines to collect your blood sample.
If you're not able to fill the blood sample collection tube to the required level, don't worry! Our advice is to return the samples you were able to collect and our lab will test for the STIs they can given the samples you return.