Please help a married women

Hi ladies

Ive been having so much trouble this past few months with my husband. Today we just had a big fight I love this men with all my heart and his a good guy. I just think his hiding things from me. For example this morning a girl he use to sleep with texted him at 7.50 this morning asking him can he drop her somewhere, first she rang him but he didn't answer the phone then she texted him. I know his started doing a car business but I was thinking why didn't he pick up. Then I was on his phone in the week and he got a text from another girl asking him for his work address and I was thinking why does she need to know where he works. He took the phone and didn't even tell me what it's about. So this morning I spoke to him. I asked him why he don't pick up the phone when it's his female friends and why didn't he tell me that someone was coming to his work. He was like I'm only helping a friend, but in my eyes if shes his friend why hide it from me we tell each other everything. I just feel his disrespectful. Then after that he rings his mum to come get his Lil girl. I was soo mad and right now I'm having his child and Ive been married 3 years I'm just so fed up. Should I trust him or is it just me over reacting. Please help