Hello and thanks for the query,
This is a bit unusual. Sometimes if there is a valve in the vein it can cause difficulty in advancing the needle. Since you did not donate blood in light of this complication you should still be able to donate again without having to wait 8 weks. This is up to the discretion of the medical director of the blood bank
, however. You might call the donor center to inquire and if there is any confusion ask them to review your file with the medical director and that physician may clear you to come and donate again.
Thanks agaoin for the query,