It looks like you recently had several of your answers automatically deleted after 6 different people flagged them as "spam".
And considering that each answer deletion as a result of spam flags costs you -100 reputation, that can really bring down your overall score in a hurry.
Here are the deleted answers I found (note that only you and other users with 10K+ rep can see them):
From a quick inspection, it looks like they're links back to your blog without any disclosure of your affiliation, or explanation as to why the linked article answers the question. Beyond that, the typical expectation here is that answers are self-contained, meaning that all the necessary information is written directly in the answer itself, rather than relying on external links. That way, if the links ever die (as happens occasionally on the Internet), the answer will still be informative to future users.
A moderator thoughtfully left you this courtesy comment on one of your answers a few minutes before it was automatically deleted from the system:
Heads-up: you're very close to seeing several of your answers deleted via community-spam votes. Might want to re-think posting multiple answers consisting only of obfuscated links to additional information - relevant portions of the information itself would be more appropriate.
You'd be well-advised to try and follow this advice in the future. You can, of course, earn the lost reputation back by contributing useful content to the system (both in the form of questions and answers), but be warned that if you continue posting spam answers, it could lead to your being banned from posting answers altogether in the future.