Boyfriend suddenly thinks I don't like him

Regina
Let me tell you, I was held hostage with this man at gunpoint during a random home invasion...okay, so I have been through hell and back with this man over the past 2 years. I get butterflies when I see him still. I think he's the most good looking man in the world. I love him to death. Well, we had our first OBGYN appointment yesterday and he just doesn't think the time line adds up for it to be his baby 🙄🙄 which, is fair enough because we did break up and my ovulation date falls just shortly after we got back together. Well, I get a big long message from him this morning essentially saying I've been acting strange and he feels like I don't like him anymore and he's obsessing on all these little things like, I didn't sit next to him when we went to go eat after the Dr. Appointment or how my phone got put on "do not disturb". Frankly, I have no idea how that setting got switched on. I don't have a passcode on my phone because I have nothing to hide. 
He said that he loves me and that he has felt pressure with all this going on and that he's scared...which is understandable. I of course responded and it's been 6 hours and no reply. I'm getting me to the point where I feel kind of annoyed but I also want to give him his space. Anyone else have issues with their boyfriends like this? It's totally out of character for him..and yet I'm the one acting strange.