Possibility of HIV
Transmission through piercing with sharps is very rare and remote possibility. Especially as you said that it was used by somebody else who may likely to be HIV positive and that person used the same hook to fish a day previously are all not at all possible to transmit the infection. There must be a fresh specimen of un-dried blood to be present to infect the other. Picking with the hook immediately after the use of the HIV Positive individual who also had just before you use means there may be some possibility. Otherwise you need not to worry about the same after you caught 10 fishes etc.
Get rid of your fear.