I’ll be 18 weeks tomorrow too 🤍 I have really bad allergies and what’s helped me is taking some extra vitamin c. Sounds like maybe you have a pinched nerve? You can ask your doctor if you can see a chiropractor who may be able to help! If it’s more like leg cramps I’ve taken magnesium which helped immensely!
I went through this as well. A Neti pot was the only thing that helped with congestion, I have bad allergies and had to stop all my prescription meds. For the leg cramping/numbness I drank milk before bed and that seemed to help