No idea how this happened, but some audio file became so big that it used up all the space of /home (/dev/mmcblk0p2) and the messages started to come up that storage is full and I cannot recieve and send any messages before I remove something. I understand that it may be near to impossible to reproduce so i'll just leave it here in case someone has a similar issue and won't know how to fix it. In the end all I had to do was just remove the file which took 60% of the partition