I second the suggestion about your thyroid. While postpartum hair loss is absolutely normal, it could indicate hypothyroidism. Sometimes pregnancy can throw your thyroid out of whack; it happened to me with my 4th child and I ended up on thyroid meds for 2 years. I tried going off of them at that point, felt fine and my tsh levels stayed at a normal level. I didn't have any problems after baby #5, either. Weird, huh?
Are the headaches simple headaches or migraines?
Either way, they could also be a symptom of hypothyroidism OR they could be hormone related.
After my 2nd child was born, I had a migraine for 5 out of every 7 days during the first month. I think this was my hormones re-adjusting, but since then (for the past 16 years!) I've had hormonal migraines. I usually get them around the time of ovulation and the day before AF appears.
If you are having migraines and losing a lot of time to them, please talk to your doctor. There are meds available that will take away a migraine fairly quickly so there's no sense suffering. I've been on Imitrex for the past 9 years and it's been a godsend because I can get rid of a migraine usually within 30 minutes. It's so much better than having to retreat to my bed and lose a day or two!