Yoga in first trimester?

An

Hi ladies, I found out I’m pregnant earlier this week and was planning to continue my 6 day a week yoga practice (which I’ve been doing for quite a while) with some modifications. I went to two classes and told the instructors with no problem, but my Friday instructor basically did not allow me to attend by saying I should not be practicing until at least 11 weeks. I have chronic back pain which I manage with yoga so I’m not sure what I’ll do without my regular practice! I have an appointment with the GP on Monday to get the medical view but in the meantime wanted to see if anyone had any positive or negative experiences with yoga early in your pregnancies?

Thanks!!