Woltemade scored twice as Newcastle jumped to a 2-0 lead before being pegged back by Reece James and Joao Pedro.
The Germany international said afterwards: "Not good. We played an amazing first half with great energy and pressed really well. But in the second half, we still did quiet well but it's unlucky we conceded two goals in two situations from which we normally don't concede.
"If you saw how we played in the first half, we can win against every team, I don't know why we conceded two goals. It happened. We'll keep working on it and maybe next time, we can play 90 minutes like that."
On his double after scoring an own goal against Sunderland last week, Woltemade added: "Last week was not a good week or good game for me. When I came into the (Carabao Cup) game on Wednesday, the crowd sang my name which was so lovely. It was amazing and I knew they still liked me even when I scored the own goal.
"I wanted to give a good performance today and I think I did. I just want to say thank you to the fans for still being good with me."