You sound like me....I worried about everything! I had just lost two dogs in only 3 months when I got Petey....and I was off the deep end worrying about something being wrong with him, physically and mentally! I'm much better now, thankfully because my family was ready to commit me! I took Petey everywhere, and he would freeze up and act nervous...but he was only 10 weeks when I got him. I slowed down a bit, gave him time to bond and trust me, and now he is great....always ready for the next adventure!
Right now he has been having a BLAST....we just got him trained with the electric fence....he is loving having an acre of freedom! I am tooooooo! He can come and go out of the house, and I can be in the yard not carrying the leash around. I still watch every move he makes, but I'm not sooo freaked out about the potential to be hit by a car.
Enjoy the moments.....your sweetie will be dog size in a few weeks, no little puppy! Petey is almost 8 months, it just went too quickly...wish I'd enjoyed it more instead of worrying.....
Carol