When trying doesn't work 😢

Hey guys so I'm 30 yo and I have an 11 yo son and my bf has an 7 yo daughter and a 6 yo son but we decided that we want one together and I'm ready to have a little girl (God willing) I've only been pregnant twice my whole life because I'm usually very careful, so I never thought it would be hard. We've only been trying this month so I could just be being dramatic but I'm very impatient. I took a test today and it says negative and I'm very sad about it. My cycle is due to come soon so I guess I could wait it out until then 🙄 just needed to vent!