Peppermint tea is the best for an upset stomach (for me).
I have lot's of stomach issues so I drink a LOT of Emmetrol (nausea), it's like Cola Syrup-basically a ton of sugary syrup or some flat coke can help.
For PMS seclusion works best, LOL, JK. But those Thermacare heat patches do work wonders for any kind of body ache. I don't think it's natural but it can prevent popping ibuprofen or Aleve.
Gargling with salt water really does help a sore throat...somehow.
Like said earlier, lavender can help with total relaxation which can ease aches & pains & help you sleep. I have a spray I spray on my pillow on occasion.