BFP but am I really pregnant??

Ali • I`m 29. My husband and I just got our BFP on Valentine`s Day! This will be our first after 7 months of bfn- it`s surreal
I took a test 4 days earlier than expected period and got a positive. I was excited as my husband and I have been trying for 7 months and kept getting disappointed. 
Ironically, now I'm questioning if I'm really pregnant. I thought taking the test early and getting the bfp would be enough- now I feel like I need to wait a few days to make sure it's not a chemical pregnancy and that there's an actually baby sticking in there. 
I feel so silly for still not believing that I'm actually pregnant.