the qtip trick will help. sometimes when that young their mussels need help. put Vaseline and insert just the tip and turn...worked within seconds for my daughter. I was scared to do it at first and I had to have my mom do it but it's not too bad and she felt relief right away.
I was nervous to the first time !!! Just have help someone to hold the little legs for you !! You will be fine ! And it really did help ... They say to leave the thermometer in long enough to take a reading