Not feeling well - normal pregnancy woes or am I sick?

I’ve had a mild headache for a few days. I’ve been absolutely exhausted (sleeping about 12 hours/night) and it’s so hard to make it through my work day. I’m almost 31 weeks so I don’t know if I’m just getting towards the end when things are hard and uncomfortable or if something else could be going on. I thought maybe I had a sore throat? I get tonsil stones though so one always pops up a few days after my throat has been bothering me. The last few days though it’s like my throat is dry at night or something.