Unplanned pregnancy 😣 HELP

Someone ease my mind.. this would be baby #3. My second baby, rainbow baby is only 9 months and I’m still breastfeeding. I feel guilty like I’m robbing her. I don’t want to feel this way. I wish I was excited. I’m scared. Scared that it might go right, and scared it can go wrong. I’ve had lots of losses with infertility. I never thought this would happen. We’ve only had sex twice since birth. We aren’t on the best terms in marriage. I feel so many mixed emotions. I’m scared to have two so close also. I just feel like a big mess. I don’t even want to tell my husband yet. I know he’ll be happy but idk how I feel.. still early. I also have frozen embryos still, we planned to try when our baby was a little older. I just feel so confused and guilty.