Overreacting or no

I need someone’s help. This is my 3rd time posting here today. It’s causing an issue in my life and driving me crazy! I am pregnant. My dude keeps accusing me of cheating! Got up this morning checked his blocked numbers there was a business number there he had saved. So I looked it up. Found this girl. Texted her. Asked what was going on, she said nothing she works at a business where he gets stuff from for work. So it’s not a real business number it’s her personal phone he blocked. I asked him about it, he said she keeps talking so he blocked her and only wanted to hit her up when he wants too for work purposes. When her and I was texting she seemed really nice and understanding was confused why he had blocked her. I added her on Fb and was looking over her photos, I found one of them spiral hair ties in his drawer the other day, and I notice she wears them in her pictures. I’ve never worn one or seen it in my life. The one I found in his room he said he never seen before. Listen, idk if this guy is cheating on me. This entire situation has me thinking he’s a cheater. He has yelled at me so much saying he wants this family with me, he bought me a small cake, hugging bears, a candle and a really nice card for Valentine’s Day yesterday. He basically gets me anything I ever want as well. Helps me with my bills if I’m struggling, I’m very confused on what’s going on. If I talk to him about it, no matter what time it is, he gets really defensive and mad. I know none of you know but I really need help with this because it’s beginning to make me feel crazy….