[US]I am a victim of a Romance Scam. What now?

I was Romance scammed for about 3 or 4k USD over the course of 5 months or so.

Here's the takeaway: The signs were there. I just didn't listen to my gut and block her. I didn't want to know the truth. So I buried my head and kept sending her money in exchange for a sexting, pictures, videos, etc.

The final straw was when she asked me to use my credit card to transfer 10k to her Cashapp. Like an idiot I let her log in and make a payment on my credit card, not thinking with my brain, which then got returned. Now my credit card account is restricted because of fraudulent activity and will likely be closed and i will be responsible for the credit on my own in collections.

I'm not really sure what to do here. I've blocked her on everything. I haven't received any nefarious messages but I have reason to believe "she" is going to try to extort me.

Is it necessary to report this scam or should I just let it go? Any help or similar experiences are welcomed. Thank you for reading.