Really lost in career plans as an upcoming third year student

I have just finished my second year and had an interview yesterday from a very small company for a summer internship that will proceed this July. This is the only internship i applied for since it had a deadline and I just applied to see whats going to happen. After yesterday just speaking to the students, it finally made me realise how unserious i have been for the past 2 years of my degree. I should have been applying to spring weeks, summer internships and even placement year programmes (since I am on the placement year course) but I am risking getting a 2:2 for second year, meaning I possibly will not be able to transfer onto the Msci programme (4 years and requires a 2:1) and there are no placement applications open right now. I feel like everything is a little too late for me to realise that I ****ed up, I should have been on the game early since it's already really competitive but I am just a bit lost for my plans going forward. Say i do get a 2:2 when results come out, this means that I will stay on the BSc programme and i will be a third year student. Does this close me off from applying to summer internships since they are open for penultimate year students only? I just hope that I get to secure at least an internship before I graduate, since I heard having no internships or experience will make it very hard for you to land a job. i am just very lost at the moment and don't really know what to do going forward.