Facebook Reach

My facebook page post reach has gone down more than 50% than the usual this past three days. I mean I was getting 300-600 likes and 70-150 shares on my every post last week until Tuesday and since Wednesday I am only getting 80-150 likes on every post and 20-40 shares. Is there someone also having this problem on their fb pages? My page has 10.5k likes by the way.

Its a Facebook thing.. They want you to BUY Ads.. so they throttle your reach on unpaid posts..