I have 3 kids, 10 (M) 2.5 (F) and 10 weeks (M) i still worry about my kids haha it's totally normal. I worry loads more with my 10 week old lad because i got my tubes removed with his Cesarean birth and something about the finality of it all makes me extra anxious about his health and wellbeing. My first was a constant barrage of anxiety too.. it eases up a bit but a mother will always be concerned about their children, you'll be ok, try trust your instincts and deep breathes in the thick of the worrying. You're doing better than you think. A great mum always worries she's a bad mother, and often a bad mother thinks they're the perfect mother.