How to tone down jealousy?

I am a very jealous person, and I thought I had it under control. I thought I was getting better with age!

But over the last few days, I feel it is taking over my world. I don’t want to come across to partner as this jealous, but I feel I am a little.

I think he is ok with it, as he knows what I am like. But I am not ok with it.

How do I just calm it down?