I'm so sorry you're fighting insomnia. It's hard enough to be awakened every 2 hours without being able to fall back asleep.
All of the herbs you list are considered safe for breastfeeding moms. According to the Nursing Mother's Herbal (Sheila Humphrey, RN, IBCLC) all are "A", which means no contraindications or side effects have been identified.
I make my own herbal tea with chamomile, lemon balm, oat straw, passionflower, and hops. I vary the amount of each, and don't use all each time, because you can develop a tolerance to relaxing effects of these types of herbs. But I still have nights each month where I basically don't sleep. It's incredibly frustrating to be in bed, awake, knowing you'll be so exhausted the next day.
Have you had your thyroid checked? Thyroid issues can cause insomnia. So can anemia, so having a general blood check with thyroid is a good idea, especially if the insomnia is new or worsening. Are you drinking caffeine during the day? It really makes a difference for me to eliminate all caffeine. Even if it seems like drinking a cup of coffee in the morning should have worn off by night, I find it harder to fall asleep & much more likely that I'll wake up in the middle of the night if I have that coffee.