I did have some rashes during pregnancy and sometimes they will fade off and come back again. i think should be normal.
As for tummy size, IGNORE what other commented!! My tummy was also VERY SMALL when I was preg. Can you imagine, just 3 days before delivery, ppl thought I was only 6mth+ preg and asked hw come I going to deliver 3 days later (scheduled c-sect) and thought my baby got some pro thus have to give birth at 6mth+!!! And they were shocked that I was actually 38weeks preg alrdy!! The comments were very irritating but I still managed to IGNORE cos my gynae keep assured me that tummy small doesnt mean baby is small and even baby is small doesnt mean he is unhealthy. Trust your gynae and not to listen to unwanted comments. =)