I once went to a pre-natal class, i was the only mum-to-be who was a)single and b)planned section.
It's a good job they all had big noses - helped them to truly look down at me 
Thinking it was just 'me' I then went back after DD was born. I was the only one breastfeeding, again the only single mum - they only on co-sleeping, the only one with no routine. I swear they were the bitchiest bitch-bags on the planet.
I had to walk 2 miles home, as I rounded the corner to my mum's house (was living there at the time) my dad came and met me, all concerned, he asked "what on earth's happened?" at which point I sobbed my heart out - he said my face as I came into sight was distraught! 
I can't believe that I allowed people that I didn't know make me feel that bad about myself.
Take a breath, leave this forum/group and find your own niche.
I did and it worked out brilliantly - took time, but I got there.
My rule in life, 8 years on, is that the people who make you feel shit are not worth the time. Surround yourself with people who make you smile, or at the very least who don't make you cry.
Chin up 