9/10 of my friends are men, if I got bent out of shape every time they made a tactless remark when we are joking around, even when they are trying to be sensitive. I would have one friend left.

They degrade each other in banter(play fights) all the time, and if your close enough as a girl that they bring you into this consider yourself an honorary bloke.
With that in mind they do tend to forget their filters, but it generally means good things not bad.

My very very best friend is a guy, and yes two months ago asked me in all sincerity if I was pregnant.

I was like, " no honey, I'm just fat." and rolled my eyes.
I didn't need to make a big deal about it he was suitably mortified by his own bad judgement.

OP, as good a friend as she feels, she obviously isn't used to the gender devide, And since you apologised, and she accepted she should really let it go.
If you get the chance talk to her about things but maybe she just doesn't feel as secure in herself around you as she did.
Yes I believe she over reacted, and her behaviour is a little immature.
Maybe just don't rely too much on things going back to how they were.
Take care.