5weeks, not many symptoms????

Shell • Had our Rainbow Baby boy in Dec 2017 💙 and now trying for baby #2❤👶🏻🤗❤️
Hi all - week 4 I FELT pregnant....absent minded, emotional, waves of nausea here and there, overly exhausted and the kicker: 3 positive pregnancy tests. 
Now, this is my rainbow baby. So I'm nervous that at my first ultrasound on May 1st, I'll get the same bad news (that baby passed). We tried for a year and were so happy and I never worried and BOOM, lost the baby. I can't help but feel like it's not real until the ultrasound apt they see my baby is growing beautifully. 
So week 5 now and my symptoms are MIA. Sure I'm tired and I have boogers like a 5 year old for some reason but no nausea, no sore boobs, is it just too early right now? I'm not saying I want to feel miserable but it makes me worried that if I don't feel those things then my baby may not make it. Trying to think positive! Please tell me your stories...thx ladies ❤