it is normal to get some, but you could try and beef yourself up a bit. it is hard to prioritise yourself. I was always being ill but cut my work hours down to get some me time and it made a huge difference.I tried to improve my diet, took extra vitamin c at the first signs, healthier diet and tried to do some exercise also. I think i went to see a homoeopath too! It can get worse when they are at school, so try and chill a bit (LOL)