I think it's safe to say that you're in no good position when you feel anxious, worried, or any feeling that is negative feeling while gambling.
I'm a bit anxious person; sometimes I feel anxious about most things that could happen as a result of my present actions. So, losing in gambling could be a huge barricade for me to never do gambling while I'm being attacked with anxiety.
It could be different for other people, though. However, gambling while bearing a negative feeling is not good. Negative feeling equates to bad luck.