So nervous

So I’m nearly 16 weeks pregnant with my second baby and I feel so much more nervous this time around about miscarriage, I haven’t got a bump yet just feel like Iv put on a bit of weight! I feel like I’m looking for every sign, I had no bleeding or anything and my previous pregnancy was ok bar the morning sickness and fainting... I have a gorgeous daughter who’s 15 months so she keeping me busy but has anyone else felt like this and know how to make it easier?

Thanks in advance