Earliest pregnancy signs??!!

I have a feeling I may be pregnant but I am waiting until I miss my next period to check. My last period was extremely light and sort of resembled implantation bleeding but I had also taken a plan B pill the month before and I have heard of that messing with your cycle. I know I should be on BC to avoid this but I have to wait until June to see my doc. Anyway, I was wondering if anyone has experienced early pregnancy signs beside a missed period???