I need advice!! please ladies

So I had a miscarriage last month the 14th and me and my bf have been trying again this month my af is due the 14th I've been having lots of cramping and back pain which could go either way ( preg or period) we live in Florida and want to go you universal next week to relieve some stress and ride roller coasters but what if I am pregnant and i don't know it what if it makes me miscarriage ugghhhhh so many what ifs