I guess it depends on the school. At my school. Most of the calc teachers in the summer taught during the regular semester.Odds are the professor he took won't teach in the fall semester. I may be wrong though given it's the summer. But when I took calc 2 in fall 2015 that same professor wasn't teaching calc 2 in the spring.
For future reference OP, if you wanna pass calc you should form a study group and review whatever yall learned in class right after you get out of class and again before you go to bed. Thats what helped me.
And find a way to get the solutions manual.

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That is, unless you plan on seriously improving your study skills. Of all my engineering courses, the Math sequence was the easiest.

bytch I'm not understanding yo methods hoe, run that back for me one Moe gin. I'm a complete dumbass when it comes to math so asking questions in class helped me pass.