Sleeping

Do I feel really disspointed in myself. My anexcity has been really bad this week and tonight I was that tired I didn’t wake up till my little one till 10-15 mins in his cry. My partner said he heard him crying outside the house when he was about to walk the dog and thought that I would be awake to hear him from his nursery and realised when he came back he was still crying from his bedroom and also I had his monitor right next to my head. I feel so heartbroken that I should be the one to hear his first cries I wasn’t there for him and now I feel like I won’t be able to sleep now knowing that as I’m so worried I’m not gonna wake up to him. Do you think I need to go to doctors about this as this as it’s happened about 2-3 now since him being born. Personally I think it’s that I’m so tired, I don’t know when I had a nap in the last two weeks with him which I know that does helps but I feel so heart broken 😭