Confused.com

I neeed advice! I'm not sure if I'm feeling pregnancy symptoms or I'm just imagining they're there cos I want them to be :( me and my partner have a very good sex life and the past week I have had a constant butterfly feeling in my belly, and the bottom of my belly feels firm rather than soft. I have felt quite sicky in the mornings and my boobs appear bigger although they haven't been sore or tingled in any way! I am due my period in two weeks! I don't wanna get my hopes up for it to be a negative result ?