A lot of your cons list seems to be things you are afraid of, rather than specific downsides - afraid of people judging, not liking your baby, losing your job etc, do you have anyone in real life you can talk these fears through with?
It would be worth you doing some research into the practical side of things, particularly the job situation. Is there anyone at work, eg in HR, you could talk to about maternity provisions? Depending how long you have been working, you will be entitled to statutory maternity pay and leave (in other words, you can go on maternity leave for up to a year and can't lose your job because of it). This isn't something that it is optional for your workplace to offer, it's by law.
I'm sure you won't lose all the friends you have, though friendships might change, but you would almost certainly make new friends through baby/toddler groups etc.
Do as much research as you can into what you're facing, and make sure that whatever decision you make it is your decision, made for the right reasons, and not just because you're scared.
(((hugs)))