STEM GPA drop in last semester

[majesstic]

Hey! So I am in the process of applying to graduate school in the fall for marine biogeochemistry (chemical/biological oceanography). I had a TERRIBLE semester in my last semester of college (Dec 2017) where my GPA went from a 3.45 (3.58 with my AS degree GPA incorporated) to a 3.16 (not including my AS degree GPA). I got 3 D's (when I am a straight A/B student) mainly because I had a major death in the family, I was overwhelmed, and had a TON of serious mental stuff going on (depression, anxiety). I am SUPER stressed out about my applications at this point and don't really know what to do about it. I retook one of the classes and got a B but the other two were incompletes that my professors kind of screwed me over with. One of the professors is working with me to fix the D to a higher grade but still... I am STRESSED and I don't know what to do about this since I already graduated. 

I have a ton of theoretical (aka modeling) research experience in my UG, took a gap year to travel to Thailand for research in my field where I created and implemented the methodology within my lab group, and I am going to start research in a lab this summer working DIRECTLY in my field (ocean acidification research). I have STRONG, super strong, LORs and I am going to retake the GRE this summer (because I took it that semester and while my scores are average, I know I can do better).