I think I have postpartum anxiety

My baby is healthy and I had a c section which went well. He’s 13 days old and I’ve progressively gotten more and more anxious. My partner has been amazing helping me with bubs, but he’s going back to work tomorrow. I find I get very anxious at the thought of being alone with him because I worry “what happens if I can’t soothe him or stop him crying”

I don’t know if it’s something that will settle over time or something I can do to help.