what do you think?

According to my calculations (because of my last period) I think I am 8 weeks. However, my last period was short and lighter than normal. My mom thinks because of the bump I already have (it doesn't fluctuate like bloating) and the fact I can't fit in my jeans anymore without using the hair tie trick, I may be a month ahead at 12 weeks. I don't go for my first appointment till May 9th. What do you think?