Oh I am calm Mariann. But there is a huge burden on my heart for you. I have walked this path, and can tell you from personal experience, that we as SDA's are sorely lacking in the teachings of just how involved the adversaries forces become when we set ourselves against him and for Jesus...
It is only through Abba Father and His great and wonderful provision for us that victory is ours. Jesus has won the battle and the war. But unlike our beloved Jesus who is True, Just, Wonderful and our Saviour, the adversary's side cheats.
Blessings and Curses is not available free on the internet. But it is a small book. Surely it is not prohibitively expensive. I would imagine less than $8. Mine was given to me, or I would know...

My husband laughed at me, and urged me to be calm as well, saying he had no need of armor because Jesus fights for him... And God would give him strength whenever he asked. I know you do not know me, and I know it sounds melodramatic, but I tell you with truth before Abba, knowing He will see and hear these words....
A curse placed on my husband's family in 1569 nearly killed him in January of this year. Only Abba, and His mercy, and sowing prayer into my husband's salvation for many years has kept him alive. In the process of repentance, revoking the curse, and replacing it with Abba's Holy blessing Abba did teach me the importance He places on blessings and curses.
You say your friend began having debilitating headaches right after she began studying and dedicating her life to Abba Father and Jesus. There is a direct correlation there. And I know from personal experience when you see that kind of direct correlation, there is an active witchcraft attack either in the form of an existing curse or soulish prayers.
After a week long intercession for my husband, including fasting and seeking Abba's face for an entire 24 hour period, doing nothing else, we prayed to revoke the curse, to dissolve all effects with true Jesus Blood, and for healing.
Immediately thereafter, I was shaken with doubt, because this was soooo "out there" from everything I had been taught as an SDA growing up. And I prayed again, laying a fleece before Abba. I asked Him, that if this teaching be from Him, the proof would be in the healing of my husband.
My husband had been diagnosed with diabetes, chronic coronary disease, high blood pressure, emphysema, chronic pancreatitis, angina, adrenal masses, pericardial effusion and kidney lesions.
By February 1 his bald spot was filling in, by February 15th his diabetes was completely under control with diet alone, no more meds, his blood pressure was normal, also without meds, the fluid around his heart that was causing heart failure had dissipated, the fluid in his lungs had vanished, and his cholesterol and lipids were normal.
By April 1, we were able to be intimate for the first time in almost two years due to his health issues.
My husband continues to astound the physicians who are caring for him... because they couldn't really find a reason for all that went "wrong" for two years, nor can they find a reason for all that is suddenly going right.
I know first hand the adversary is sneaky, underhanded, and a cheater. Take the time to protect yourself and your loved ones daily. There is no doubt in my mind that your friend is laboring under an active curse.
Clio