If he is ignoring you or making fun of you, he is, but if he is a little distant and confused you should talk to him, If he doesnt want to talk to you or doesnt look at you anymore, chances are that...
Long-term: No.
Short-term: If you try to play the clarinet (or any other wind instrument) right after playing the trumpet, it may take a few minutes to adjust to the different playing style.
It is mostly about learning to adjust your touch (organ touch is completely different from piano touch). It is easier to learn by doing it than to try and explain it - you'll catch on quickly. And...