You can't do heavy lifting especially from the floor. Like she said you can miscarry since your in first trimester. Just go for walks or some wall pushups. There's pregnancy yoga apps that I've been doing
And what I mean by light yoga is basically the poses that help stretch and relax you. Don't get get crazy. And also talk to your dr and see what they recommend.
What kind of working out are you talking about? Heavy lifting or safe pregnant work outs?
Maybe some light walking or really light yoga but no its not otherwise, especially in the first trimester, if it's too much you can miscarry.