I make Oregano pesto with mine.
I once had an oregano about 12 years ago.
I let it flower and 3 years later I had 100 oreganos. the next year I had so many I couldn't count.
I used to dig them out and pot them on to give away, to sell, I used them for teaching, I ate them, I composted them and still they kept coming.
Two summers ago I decided that I would have none in the garden and only keep them in pots near the house. I would go out to my garden, fill the wheely bin with them, fortnight after fortnight and I still have them growing in the garden. Now they have worked out what I am doing, they are growing in the lawn path, which I don't mind as it gets mowed regularly.
As soon as the wonderful flowers fade, chop them back to the ground otherwise you will be digging them out forever.