Weightlifting in 1st trimester

W • Married to my dream boat. MC Jan 2015. Baby #1 due 1-10-16. Hoping for a healthy 9 months!
Hey ladies. I took a pregnancy test today after three months of trying to conceive post miscarriage and it was positive!  Yay!  
However, I'm a little nervous as my first mc started while I was at the gym. I go three times a week and lift weights. I know my doc said working out did NOT cause my mc but I am still a little anxious about it. 
What did you do during your first trimester??   My test was so faint I'm so early on (AF isn't late yet) and I don't want to loose this one.