Feeling Guilty for Dating After Breakup

I dont know what's wrong with me...I have been single for 3 months, after being in a relationship with the same man for 7 years. It was a very toxic relationship, he was a patholilogical liar and a narcassist and cheated on me several times. I've been doing good being single and just enjoying my own space and my me time. I started talking to a guy a few days ago, we went on a date yesterday and it went good, and then I hung out with him for a bit again tonight and we kissed. It was great, he's really sweet and is everything I want in a man. But after I left his house and got home, I immediately broke down in tears because I'm feeling guilty. Has anyone ever felt this way? I feel like I've lost my mind! It's been so long since I've dated someone. Is this normal? Any advice on how I can get over this feeling would be appreciated greatly.