I’M PREGNANT!! read below

I’ve took 4 pregnancy tests, 3 cheapys the past few days and 1 First response early result today, they were all positive. I know that means i’m pregnant but my friend told me to test with a digital one in a couple days to make sure it’s not a chemical pregnancy, so it’ll tell me how far along i am. that scares me because i miscarried back in September. Any advice?!