How to create trust in a relationship with shaky foundation?

When I started a relationship on shaky foundation. I started dating my actual boyfriend when I was still with my ex but avoided to meet my ex, and tried to make him break up with me as I didn't have the courage to be honest with both. After 2 months my actual boyfriend discovered it and I broke up with my ex telling it started 2 months ago, and told him as he didn't want to have intimacy with me during our 8th months relationship , I had with the other guy. But I have fallen in love with my boyfriend even if it was a bit confusing and I do not know why I was hiding it from him. Do you know how I can re create the trust of our relationship to have a trust foundation from now as he is confused if I loved him from the start or all is fake. We are now in 5 months relationship and I got pregnant of him which we were not expecting and we just discovered. What can I do for him to trust and let him be vulnerable with me again?

How to create trust in a relationship with shaky foundation?
Post Opinion