Anxiety?

My baby is 7 weeks old and I obsessively think about SIDS. I try to stay awake of a night so I can watch her sleep, if I'm putting her down to sleep and I know I'm also going to sleep I get upset and keep telling her how much I love her. I only really sleep soundly when I know someone is awake with her (usually the day time). Last night I woke up and couldn't hear her normal grunts and sighs so I leapt up so quickly that I woke my husband up. I have her in a cosleeping bassinet right next to the bed so it's not like she's far away. I wake up multiple times a night just to reach out and touch her stomach to make sure she's still breathing. I don't really interact with my husband much anymore because if she's sleeping in my arms I think about putting her down in her bassinet and spending one on one time with him but that thought is quickly followed by "but what if she dies in her sleep". I'm too scared to leave her sleeping if no one else is in the room with her. Are these normal worries or am I going over the top? I only really started this over the last week.