What do I do.... Help 😔

I have been with my boyfriend for a year & a half. He was my best friend, and I loved him so much. I'm 10 (almost 11) weeks pregnant, and at about 8-9 weeks everything started to change. I have become so paranoid about everything... I'm so paranoid that he's cheating on me, I overthink every little thing he does, says, even the way he breathes. I know in my heart he's not cheating, but I can't get this thought out of my head. Everytime I look at him the last couple of weeks, I can pick a thousand things out about him that I "hate." His hair, his clothes, his nose hairs, anything & everything. Now I feel like I "don't love him anymore." Every little thing makes me mad, and I start a fight. I am so emotional and I don't know how to get through this. I think about not being with him & it kills me. I want to be with him, but I'm constantly finding reasons to be unhappy & now I'm thinking I don't love him. I feel like these are all hormones & emotions that I will pass, but idk what to do. How can I get through this? What do I do... I'm tired of fighting. I'm tired of feeling this way, and feeling so unhappy. This pregnancy was very unplanned (but we are thrilled) it's just taking so much out of both of us. So much stress, emotionally, financially, everything.... What do I do...