Worried to trust him again

Hello so I’m needing advise from someone who’s went through this no judging please

I’ve been with my fiancé for 5 years I was pregnant with our second child until end of April of this year the entire Time I was pregnant he was acting differently I had found out he had broke A promise he made to me when we first got together that he won’t look at porn or anything that resulted to other naked women after I had our daughter which caused me to feel like he broke that trust in our relationship and I was just heartbroken we did talk about it the first time which didn’t do anything he kept doing it I finally had told him I was going to leave him because I couldn’t be with someone that looks at porn I felt it was disrespectful to me and our relationship and I was in bad massive depression state mixed with bad anxiety where I have panic attacks because I’m afraid he’s not keeps his promise of not doing it again his reason on why he did it was because I wasn’t attractive doing my second pregnancy which terrifies me because I’m now pregnant with our third and worried he’ll break his promise I’ve been having a hard time trusting him ever since the end of April that my doctor requested I see a counselor due to my depression I’m to the point where I’m not sure I should stick with him and keep working on our relationship or to just move on? I just need advise on what I should do