2 Days Late! Is it too early to get excited?

Hannah
My partner and I have been trying to fall pregnant for 18 months now and today my period is 2 days late. I can't believe it, but don't want to let myself feel any sort of excitement either. I have taken a HPT and it was negative (that was yesterday CD31, 17dpo). But I'm still holding onto a little bit of hope because after a tonne of research, sometimes your HCG levels don't pick up until 6 weeks! What do you guys think? Too early to get excited??