Symptoms and come and go as they please doesn't mean anything is wrong. I'm 24 weeks with my second pregnancy and I haven't really had many symptoms. And you may have symptoms you don't even notice that are pregnancy related like bloody gums, bloody nose, acne, oily skin, constipation, funny taste in mouth, fatigue, leg cramps..etc.
Y having no symptoms makes u worry that's a good thing sum get over faster then other u worrying for no reason that's gone cause problems
Symptoms can come and go.
Unless you're bleeding, then you're most likely fine.
This is my first time being pregnant, but when I was 6 weeks iwas constantly worrying about miscarrying. My symptoms would vary all the time. My breast would be sore and tender one week and the next it would be a relief. I'm now 13 weeks and my baby is healthy. Try not to worry about it to much. Stress isn't good for you or the baby. As long as you aren't bleeding you should be fine. Congratulations I hope I was helpful.