When to get a blood test??


So I’m getting BFN’s which is common for me until I’m 1.5-2 weeks late, I’m 2 days late now and in my next pregnancy they want to try me on progesterone pessiaries as I’ve just had my 4th misscarriage at the end of September. I’m feeling pretty pregnant atm, but I’m too scared to get a blood test cos I feel like if it’s negative I’ll break my heart. 😭😭😭😭