2nd trimester Symptoms

Kat • Loves being a Mama so far.
So most days I feel okay, I always feel tired or out of energy. But it seems like once a week I have a day where I just feel terrible, like the worst day of a bad cold. I'm achy, stuffy with a headache, it's just icky and frustrating. I'm 15+4 days along- has anyone else experienced anything like this?