I concur with what others have said. I would get a friend to go with me for the test if I were you. IMO, your H has forfeited his rights to have a part in your pregnancy. I know that sounds harsh but honestly, I think him being there would just be more stressful for you and would only open the door to more mixed messages on his part. Ask yourself this… if your H had died (practically speaking, he has), what arrangements would you be doing right now to prepare for your child’s birth?
RE: looking after your son. He’s the dad. As long as you don’t have safety concerns, it’s his responsibility and he should look after him. Stick with your plans and spend the weekend with your girlfriends.
Re: the phone. My XH used to leave his phone lying around and barely paid any attention to it. He certainly didn’t care if I looked at it. One day that just changed. All of a sudden, it was always on him and he was quite protective of it. At the time, I didn’t pay too much attention to it because I trusted him. In hind sight though, it was the first big sign that something wasn’t right. Also…his defensiveness ramped up 100X when it came to me asking him any details about anything that had to do with what he was doing when he wasn’t with me. He would rarely answer the question and instead, would turn it back on me and make it about me not trusting him. I would then feel guilty about it and stop asking which is exactly what he wanted me to do. I later learned that the name for his behaviour was gaslighting and he was/is a master at it. Listen to your intuition when it comes to things like this. Unlike your H, it doesn’t lie to you.