Scared

I am pregnant again after 2 MC's and I'm trying really hard not to get excited. I have so much anxiety this pregnancy already and even worse I have no symptoms just a positive test. My previous pregnancies I had the wordt nausea right away and my boobs hurt like a mofo but not this time. I refuse to let anyone know I'm preg this time. Every time I even get a little excited theres a little voice in my head that says "don't get your hopes up." Anyone else in the same boat? What do I do?