Overwhelmed with anxiety

Sa

I am a SAHM with our 12 week old daughter. My SO is going to a training 7 hours away for 5 days. I am freaking out. I can care for our daughter by myself, that’s no issue. I pretty much do most of the parenting, as she refuses a bottle and is EBF. However, I get so lonely. I am fine during the day, as we attend a lot of events and groups throughout the week. But nights will be terrible. I am so anxious to be all alone. I don’t know why. Maybe because last time he left, I ended up having to deal with a mouse? I have stayed alone before, just never with baby. I know it sounds ridiculous and I am a grown adult, but I just can’t shake this anxiety. 😩