Too Much SPAM on WP!!!

Hi, I just received 71 comments on my WP wWebsite today. 4 pages of “SPAM”. I only got 1-2 spam per week and then 1-2 per day and it is out of control now. All I’ve done was switch my theme and now 71 spam.

What’s up with that and what can I do to fix this. I’m thinking of dropping WP and going with an HTML site to avoid this.