You write on a comment that you made your undergrad studies in a different country to the one you want to pursue graduate studies. I am also doing my undergrad in Latin America and I have a few friends here that also applied to graduate schools in the US. From their experiences, I can tell you that when an international student applies to grad school, the members of the committee pay attention if you have a bad academic record (like dropped classes or a GPA below 3.0), but good grades are not as important as you think. It's really hard to assess the knowledge and capabilities of a student based on grades given by professors from another country (let alone from another culture!).
I have a great GPA on my home country, but I cannot compare it with the GPA of a Cambridge student. There's not point of comparison, since the things I needed to achieve in order to maintain that GPA are, in some cases, easier than the ones the Cambridge student needed to complete in order to have that same GPA. I am fully aware of that, and it really sucks, because even if I studied hard and I know how to apply the knowledge I struggled to get, my degree is not as valuable as a Harvard degree, or an MIT degree. I can tell you that I had quite demanding and challenging courses, and I'm proud of the grades I got, but I also had a few courses that were pure garbage:) and everybody gets good grades on them! I cannot show how "good" I am just with my grades, since the ruler my professors used to "measure me" is not the same ruler used to measure the other international students (or local students).
If you don't come from a renowned Latin America college (for example, IMPA or UNAM), you will have a hard time finding your way to a good graduate program in the US or the UE. You will improve your chances if you can find a way to engage in undergraduate research programs, or if you have good performance in academic activities. You can also try to find scholarships addressed specifically for Latino students. I cannot give you more advice because I don't know if you want to apply for research programs or more practical programs.
I don't say those things to bring you down, but in real life the sweat and tears we shed during our undergrad journey are not as valuable as those from our fellow students coming from renowned universities:) and our grades (even if we struggled to get good ones) are not as important. That sucks but that's life.
Good luck with your future endeavors, I wish you luck in your admission process! Keep going!