Am I being harassed?

So my ex keeps calling me every day (since he’s gotten out of jail for a year!!!!) and he’s calling me off of a blocked number. All day yesterday while I was at work and all this morning. I know it’s him Bc it started soon as he was out. I’m changing my phone number but I’m just really scared if he comes to my house. What do I do? I have no way of proving the blocked numbers is him but I know it is