Bleeding and possibly pregnant

I’m four days late ;or two since my monthly can be 24-27 days . I’m now on day 30 . I took a test this morning that came out postive , took another one mid day that came out negative. I’ve been bleeding since 12 it’s now 17 . It’s not hard but it’s there . I’m having some mild cramps as well . Dr appointment set for two days from now . And advice.