Yes having anxiety or panic attacks can cause stabbing chest pains that feel similar to having a heart attack.
If you're suffering from anxiety or having a panic attack and are experiencing stabbing chest pain then it is likely just the anxiety or panic attack causing the stabbing chest pain.
If that is the case the stabbing chest pain is usually nothing to worry about as long as you're not experiencing other symptoms of a heart attack.
If you experience symptoms of a heart attack including the stabbing chest pain that gets worse or numbness in your arm, pain in left arm or pain between shoulder blades.
Or you have shortness of breath etc then call 911 or get to the emergency room right away.
It's better to make sure you're okay and not having a heart attack then to not do anything and then actually have the heart attack and die.