Helppppppppp

So I'm 15 days late today, yesterday morning I took 2 home pregnancy tests & both came up with faint lines, see photos. This morning I took another home test & a test at the doctors which was the same. Positive but faintly positive .. My doctor said because I'm 15 days late the line shouldn't be faint, which didn't make any sense to me & told me my pregnancy might not progress any further? Any advice or similar experiences? 😕