Trusting issues...

Alex • 23 | soon to be abdominal & OB/GYN Diagnostic Medical Sonographer May 2020 | taken and not TTC
My first boyfriend cheated on me for a year and I never found out till a month after I broke up with him. It was terrible because I had a feeling the whole time and never did anything about it but when I found out forreal I felt like a complete FOOL. 
Now I'm with a wonderful guy who I know would never cheat on me. The only thing is I keep having dreams that scare me and makes me feel like my unconscious self doesn't trust him if it makes sense. I had a dream that this girl I don't like walked up to him, looked at him briefly and dropped on her knees to give him a bj and I ran up and beat them both up.... What up with that?