6 months pregnant and...

🌸👑🎀 • My husband and I were TTC 4.5yrs, we then adopted our son 3.9.16 a week and a half latter, we got our bfp!!
I'm pretty sure I'm catching a bug of some sort. Yesterday I woke up with a horrible stiff/painful body, well today it is double the pain and I also noticed after awaking from my nap that I have a fever. What should I do, let it ride for a couple days or can I possibly take something? Thanks in advance ladies!