Guys, I need your input on something. Does this sound like paranoia or a legitimate concern to you:

I have an abusive ex. Today using somebody else's phone he texted me and I responded asking "who's this?" (thinking it was someone I gave my number to in the hospital or an old friend/contact I deleted for stupid reasons) and he said who he was and asked why I won't talk to him anymore. I blocked the number. Now there's a truck I don't recognize sitting across the street. There's nobody in it and it's been there for at least 20 minutes. I'm worried it's him or someone he sent to spy on me and potentially hurt me. It's a really nice truck though--something he definitely couldn't afford (but something he could borrow or steal). I don't want to leave the house or give any indication somebody's home. I live in a townhouse so maybe the neighbors just have someone over? I realize that's probably what's going on, but I highly doubt it.

Thoughts?