Sik1010 you have nothing to apologise for. You did the most important part, you said thank to the sender of your swap.
We all wait with trepidation and excitement what our swap partner's reaction is going to be with the parcel we have put together with a lot of forethought and effort. Not hearing anything, knowing it has been delivered is not nice. Even if the recipient does not post a public thank you or photos, a private one is really important.
But thank you so much for taking part. Everyone in the swap is so important.