Matthew went through phases. some weeks he HATED it. I got in the water, but just spent the time splashing around and staying above the water. Some weeks couldn't get him out. We hit age 1 and for about 5 weeks I really wondered whether to keep going. I always made sure that he left the pool happy, but i didn't push it. it was down to teeth coming through.
Now, almost 6 terms later age almost 2.5yrs, he's jumping in from the side of the pool, he sits and waits at the waters edge while a get in and come and get him. He's 'diving'. He's swimming further underwater, he knows to hold onto the side until I tell hime to turn around. He goes underwater, turns himself around through 180degrees and holds onto my arm. And every time he does something he shout 'again again'.
Speak to your instructor, they will be able to advise you, but the advice I got was to keep at it, but not to push it. They are experienced at dealing with children when they are not sure and not happy.
It is a highlight of my week. I have so much more confidence in the water with him - and its a great mummy and matthew thing to do.
Alex