is it possible to be pregnant?

Basically for my previous period i was 5 days late (with no signs of having one-i usually get swollen breats that are sore) then i only had a 4 day period (usually lasts at leasts 7days) then since then ive had loads of sticky muscus on a daily basis that also tends be smelly (which is embarrassing) especially after exercise. im scared to do a test because i get upset when it comes out negative...