Could I pregnant

Chrissie

So last time I had a period was on the 24th july, I haven't done a test because I've just had enough of the heartbreak as me and my husband have been trying since October. However when I had my last period I'm not 100% if I had a period or miscarriage due to being 14 days late then and having a clot that was bigger than a £2 coin. Would that if mucked up my cycle and made me 28days late???