Pregnant with first child a boy... and I am SO aggressive. Anyone else?

I’ve always been a stressed out person but my husband and friends have always described me as someone who is too nice for her own good and sort of gets walked on. Even before I knew baby was a boy I was MUCH more aggressive, dare I say even bitchy sometimes. (Sorry, not a better word for it but that.) Does this have something to do with possibly increased testosterone or have you being pregnant gone through this even with a girl? pregnancy has given me a back bone, that’s for sure and sometimes I think it’s not such a bad thing. 😉