13 wks - symptoms have come back

[B65]

I’m currently 13 + 2, had my dating scan last week and all was good. I stopped feeling nauseous around week 9 & have been feeling good since then, other symptoms like bloating and tender boobs. However, I woke up today feeling horrendous, a headache that will not go away, extremely tired & feeling nauseous again. Has anyone else experienced this or having these symptoms around this time? I thought I was meant to continue to feel better in the second trimester! 🤦🏼‍♀️😂

In my last pregnancy I had it on and off until 14 weeks. Maybe the placenta is almost there but not fully taken over and this is the last push of your body with the hormones before they settle? Only a guess.