Is there a way i can lock my iPhone from my computer?

Okay so my mom took my phone and I don't know if she knows my password or not but on my computer I have it to where on iTunes it automatically syncs to my phone through the Wi-Fi. Is there any way that I can lock or disable my iPhone through my iTunes? I really don't want to restore it so can i just lock it somehow?

Do you have Icloud? If you don't you should set it up. It allows you to lock your phone, see location, make a noise if you lose it so you can find it and allows you to send a message to your phone incase u lose it