Erin, Welcome. Sorry you find yourself in need of this site, but it has been a sanity saver for me as a mom of a teenage ITP patient.
Headaches: Some folks here have noticed a connection between ITP and migraine. My daughter was prone to migraines long before the ITP diagnosis, but I have them, too, and my sister has seizures triggered by many of the same factors that trigger my migraines (fluorescent lighting can be awful). My daughter's migraines surfaced around six years old, then stopped after a couple years. Later, at almost 13, she was diagnosed with ITP. She also was prone to anxiety from an early age.
Treatment/lifestyle: My daughter had one really stressful year with ITP before starting her remission. IVIG helped her reach a safe count, but we always knew it was not a "cure." Eventually, the patient and doctor learn what the patient can tolerate. Some here never treat. She had IVIG three times and tried one "pulse" of decadron. Her first IVIG was soon after her first low count, when her count was below 20. The second was done when her count was 3. (She looked great, and we had believed she would have a good count that day.) She generally tolerated counts as low as 13 without treatment, but we tried decadron pulses so she could resume sports. (She loved volleyball, but missed a season for low counts. She could do mild tennis if over 25.) The decadron got her counts up to 50, but as soon as the dosage stopped, she dropped rapidly to 15, and didn't tolerate the rapid drop. She ended up with a severe nosebleed, lost a pint or so, and had to have IVIG for the third time. Each IVIG was inpatient. She was hospitalized three times for IVIG, and one time for side effects (aseptic meningitis after the first treatment) in the first year. I thought I would go crazy, crying alone at the wheel of the car because I kept up a positive front while she was around. After that, she miraculously started climbing on her own. She now runs low normal to near normal counts always, but we never get cleared to go more than six months between counts. She has been running consistently safe counts without treatment for over three years now. (Still, every time the count is lower than normal, or lower than last time, I am discouraged for a brief while. I will never totally get beyond ITP, and will always be on guard for a relapse. Every odd bruise is questioned.) ITP can be managed for a good life, and the patient can find ways to adapt and live fully. Risks must be appreciated and heeded, but they can be dealt with. Remissions do happen, spontaneously and after treatments. There are a number of good articles in Blood magazine, which can be accessed from here I think. If not, google should work to find it. I found the remission studies to be encouraging. I also encouraged my daughter to keep the rest of her health up, by eating right, taking a good multivitamin, and getting enough sleep. My thoughts were that, if she had a crisis due to the ITP, a healthy body would withstand better than a poorly nourished, poorly rested one. Also, while we never found extra vitamin C to help with counts, it does seem to help with vessel integrity, cutting down on bruises and nosebleeds.
Hope your hubby soon has a lifelong remission. Until then, know that it can be managed.
Norma