4 days late

I was diagnosed with PCOD (Poly Cystic Ovarian Disease) when I was 14 and my husband has thought he has “slow swimmers”. I’ve been 4 days late and more before and I’ve FELT, KNOWN, in my heart that I was pregnant before and had it torn from me by a pregnancy test too many times...but now I’m 4 days late....again and I’m too scared to tell my husband and nowhere is open right now to buy a test. Idk I just needed someone to tell and I’m SO sure if I take this test it’s gunna be negative again...someone tell me that even if it is negative that I can carry a baby SOME day? And if you’re a praying, good vibe sending, thought giving, whatever person, please send whatever it is my way so that one day I can be a mommy.