I've broken my collarbone 3 times, once on one side and twice on the other. In all cases I was back on the bike in 3 weeks and racing in 6 weeks. Unless you've had complications or some medical condition that affects healing, I can't understand how you still need to be so careful after 2 months. The collarbone is probably the least important bone you can break as it doesn't carry any load, so even if it isn't fully healed it doesn't matter. Sounds like maybe you've got one of those nanny worry wort doctors.