Messed up the second semester, will my college acceptance be rescinded

Hi. Recently, I got accepted to Gettysburg college (got accepted the waitlist). I was thrilled about this, however, there was a problem here. My senior course load includes 4 APs, and for the first semester, I did fine, no failing classes. But to the third quarter, things got tough and I failed my AP computer science class, with a drop in my ap calc bc as well, from a B to a D. For the final quarter, I was able to get my AP comp sci A grade up and I didn't fail, but my AP Calc BC grade this quarter has dropped and I failed this quarter. These two classes are online classes on VIrtual High school and they were really tough to me as I am a more of a traditional class student. The grades for those two classes are all closed so there is nothing I can change about that. I will try to write an email explain the situation, but I don’t know, will I get rescinded for this? Since I was on the waitlist, I am really afraid that the chance of me getting rescinded is higher than other students. Also I am an international student and I got a very generous financial aid package from Gettysburg College.