Singulair Breastfed Baby, Heart Palpitations, Asthma Medicine, Thyroid Levels, Tight Neck

I was on Singulair while pregnant because my asthma got worse while pregnant. Postpartum I noticed my 2 month old breastfed baby was still sleeping way too much and very colicky. I tried cutting out dairy and other allergens but nothing made a difference. When I forgot to take my Singulair a couple days in a row, I noticed my mood was much improved and the anger/irritability went away. Finally, after noticing I was having vivid, bad dreams, I began to realize it might be all from the Singulair. I also had developed a stiff, tight neck and vision loss, which I now realize was also from being on Singulair.
I went off of it and must say, that was the worst week of my life. I never felt so horrible or out of control. Although I noticed the first few days, I was happy and feeling again (it made me emotionally numb) by the fourth day, I began having heart palpitations and bad headaches. I quickly got my thyroid levels checked and those were fine. Then I suddenly had severe panic attacks! I thought I was going crazy! This was mistakenly misdiagnosed as PPD, although I was never even depressed. I was given a script for Zoloft and took Ativan but that didn't take away the panic and the Zoloft seemed to make the panic worse!
I began researching and realized all of my symptoms were from Singulair withdrawals! Even my family noticed I became a mean and hateful person with this last pregnancy. This drug is an awful poison! I am slowly recovering and feeling better everyday. I'm using my fast acting inhaler for the time being. Instead of the therapy I thought I needed for PPD (mis dx'd obviously) I'm also using herbs to treat this homeopathically with a natural doctor since conventional ones still want to pass it off as something it is not due to ignorance that an asthma medicine can wreck this kind of havoc on a person! They just want to use more drugs to treat the side effects of another drug!
I am so angry I took this while pregnant and breastfeeding being told it was okay. It was not okay and I hope and pray there are no long term side effects to my child from this drug!