Testing please advise

At 10w 4d I had an ultrasound. Dr said it looked healthy. She asked if we wanted any tests to look for abnormalities- at the time I said I would think about them and she said to let her know before 15 weeks. Well... Time has gone and I need to let her know tomorrow!!! I've done a bit of research but there's so much info I just get overwhelmed and confused! It doesn't matter to me if this baby has differences, I'll keep it and love it anyways. But I don't know what I should do test wise? Any advice?