In 11th week and experiencing less constipation, bloating and morning sickness?

For the majority of my pregnancy I've been constipated (I was like clock work pre-pregnancy), bloated and was relatively nauseous throughout. The nausea got better right at 10 weeks and in the past few days I've felt less bloated (though pants are tight in my belly) and been having almost pre-pregnancy bowel movements. It seems too early to be getting some of this relief as I'm nearing my second trimester. Has anyone experienced this? I'm somewhat of a worry wart and don't know if this is something to be nervous about. Any insight would be much appreciated!