What should I do (details inside)?

It all started at the military camp. My friends (a total of 4) and I stayed together in a room. The military course required us to stay at the camp for a month, which meant that we had to live with each other in the room 24/7. When we began to find out each other’s bad habits, things started to get wrong. And for me, some things happened that turned everything into a disaster: Two of the girls one day claimed they didn’t like my way of talking, saying I didn’t seem to share many interests with them. To make the matter worse, there was a time that I accidentally spread my cold to the same girls just days before our first test! After all those horrible incidents I had the feeling that they seemed to avoid chatting with me, those all of us still hung out together at our free time.

I was so scared that they had stopped being friends with me that I talked to the two other girls privately. They were quite sympathetic and stated that the problem was just because we had to live together and everything would be back to normal after the course. And now the course had finished and we were back to the university. But when I met the two irritated girls, I felt as if a heavy weight was put onto my shoulders. I just want to say hi to them, to join their conversation and laugh with them like the old time, but somehow I felt afraid. I’m afraid they still don’t forget the incidents and will tell me to go away. But seeing all the four girls talking happily to each other just break my heart. I don’t know why I don’t have the gut to ask them directly what they feel about me, but I don’t want to talk to the two other girls about my problem, least they will think I’m starting “overthinking it” again (I am famous among my friends as a “exaggerating queen” for my tendency to worry about things which actually isn’t very serious).

Now I’m very depressed. Am I right to worry, or am I just overthinking the problem? What should I do now? Sometimes I just wish we didn’t have to take that course or I could go back in time so that I didn’t have to deal with all of this.