I took my cat to the park this morning like i always do. It usually really nice and quiet. Well a really big loud truck came by 2 times and he got really scared and tried running away. He was wearing his harness and i didnt let go of leash. I took him back home. He began to pant(which i thought was a normal reaction to beong scared.) But now he wont eat or drink his water and his breathing is really fast and heavy...is he just still worked up from early or should i be worried that its something else. Im freaking out right now because hes never actted like this. :/