Totaly normal, your gums are very inflammed right now, there was probably lots of tartar underneath your gums the hygienist had to remove. This was nescessary because if tartar is left under your gums, your body doesn't like it.
Over time, your gums become inflammed red and bleed. That's gingivitis, if you don't floss daily, this will progress to periodontitis. Periodontitis or periodontal disease is when there is tartar under your gums left, your body doesn't like it and the bone actually starts receding away from your teeth, leaving less support for your teeth. Often the symptoms for perio are not much different than those of gingivitis. Your hygienist can tell you if you have perio by looking at your xrays or probing between your teeth and gums.
My advise to you, go for regular cleanings and floss.