I've been on the Loestrin 24 Fe birth control pill for 2 months and am now 5 days into my 3rd pack. Yesterday I had severe headaches, body aches, and nausea. Today I have a severe headache still, and bad nausea, like I could throw up soon. I know that these are side effects in the first 3 packs, but I felt fine in those first 2 months. Why is it the 3rd pack that I feel like crap?