INSTAGRAM. A big drop down of likes on my photos?

Since one week I started noticing that my post has lost 60% of like I used to get on my photos before. I dont really understand that at all. And I hav

Since one week I started noticing that my post has lost 60% of like I used to get on my photos before. I don't really understand that at all. And I have more than 20 followers in this week. I checked the setting, my profile is public and everything is Ok. I post 2 to 3 photos per day. I put my usual hashtags. I don't really get that. I have about 760 followers and I was getting more than 120 to 150 likes on my photos. In just one week everything drops down. How come? Can someone help me for this issue please.
Thank you.

or:Since one week I started noticing that my post has lost 60% of like I used to get on my photos before. I don't really understand that at all. And I have more than 20 followers in this week. I checked the setting, my profile is public and everything is Ok. I post 2 to 3 photos per day. I put my usual hashtags. I don't really get that. I have about 760 followers and I was getting more than 120 to 150 likes on my photos. In just one week everything drops down. How come? Can someone help me for this issue please.Thank you.

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