First time posting here but have been lurking for a couple months.

I've been struggling with high anxiety since September after some work stress and lack of sleep lead to some panic attacks. I've gotten over the panic attacks but the anxiety is still there and my biggest struggle right now comes from intrusive thoughts usually related to my existence and life's purpose. Rationally I can tell myself life is what we make of it but what I'm assuming is my anxious mind has constantly obsessed with finding purpose.

This has all been going on for about a week now and it's really really put me into a depression. I've gotten over intrusive thoughts before after reading about you can ruminate on them until they spin themselves out. But I feel like I can't ruminate on existence and life because there's no "next level" to take it to and I just get caught in a loop. 

Anyone have any similar experience or other insights about getting over intrusive thoughts?