Very dumb question.

When the ob measure your stomach area with the tape. Are tgey measuring your uterus right. So when they say your measuring two weeks ahead my uterus is just bigger? Hahha

Yes, but it's ok to measure a couple weeks ahead or behind. Mostly because that form of measuring the uterus has been proven to be inaccurate.

Yep! Lol I've been measuring ahead by 3 weeks

Yes, they're measuring your fundal height. The midwife told me today that you should measure within 2 cm of the week you're at in pregnancy. For example, if you're 30 weeks, then between 28-32 cm.