I browsed CNN climate news a few days ago to review 2020's dramatic weather disasters over the world. At the very beginning of 2020, the Australian forest fire attracted global attention. Myriad animals lost their habitats, food and even lives. Additionally, WMO said the incidence rate of hurricanes was at the acme as well; this has caused a severe impact on our daily lives. Furthermore, carbon dioxide emissions keep going up and make a greenhouse effect become more conspicuous. As I see things, if we would not like to have a hotter summer in the future, we need to take actions and require our governments to sign environmental protection related contracts urgently. ~~~~~ Saying that we "just" did something most often refers to something that we were doing very recently. Since you specified that you did this a few days ago, I don't think it adds any information to add the word "just." (You could include the word "just" later in the sentence if you want to emphasize that it, "I browsed CNN climate news just a few days ago." if you want to emphasize that it wasn't very long ago). I have never heard "retrospect" used as a verb. The dictionary says that it is rare for "retrospect" to be used as a verb. That is why I changed "for retrospecting" to "to review". (The most common use of "retrospect" is in the phrase "in retrospect.") "gotta" is very informal. It can be used in text messages or very casual chats with friends. In other situations it is better to say or write "have to" or "need to" or "should", etc