Hi Nepthys and welcome to the board. I see you've found the current Block of the Month, if you want to check out previous blocks there is a fixed post at the top of the main board with links in it to all the other BOMs :P .
Also re your bobbin, I don't know if this is the case but could be poss, so thought I'd mention it. My bernina sews like that when I forget and put the bobbin in the wrong way, Alot of machines have the bobbin running anticlockwise my bernina is clockwise and sometimes I forgets :lol: