EARLY symptoms?!

I am currently 11DPO, BUT have been (very) nauseous every morning since Monday (8DPO). I never, ever, ever remember my dreams and the last 3 nights I've had extremely vivid dreams. On top of this I could sleep non-stop. However, my mother and brother in law both had a flu bug earlier this week and I spent the weekend at the lake with them. Wondering if I'm being crazy or if it's possible ?! We BD every "green" (ovulating) day. This is just our first month TTC with our 1st so I'll be SO excited if it happened this quickly... but also don't want to seem insane thinking that it could be with symptoms this early.,. Thoughts?!