When I was pregnant with T I didn't show properly until I was about 20 weeks, but I was uncomfortable in skinny jeans by the time I was 12 weeks along, just because they were tight. It really depends on your body, but at that stage you can probably get away with most of your normal clothes, maybe minus the tighter ones.
This time I feel so bloated already, especially in the evenings. Might have to ditch the skinnies a little sooner...
xxx