Should I test?! (Or am I kidding myself?!)

Cat

Period four days late, spotted for two days, bled for two days - lighter than normal but too much for implantation I think) spotted again once a day later but since last week have had: nausea, fatigue, sore boobs, heightened sense of smell (even though have a cold) and I cry at sofa adverts, Masterchef and baby animals...you get the picture (it's not pretty!)

I feel different but I'm so scared I'm just kidding myself and it will be another negative. It's been 18 months now. Just can't shake the maybe feeling - someone talk some sense into me please!