How to tell my principal I’m pregnant?

I’ve been a high school teacher for over 10 years. Due to personal reasons I’ve had 2 failed marriages and had a child with my 1st husband. My 1st husband and I remained close friends and we got back together and here I am 4mo pregnant. Experienced teacher, 1st time pregnant -_-<br><br>We are actively try to hide my pregnancy, I’m very small so it’s easy to but I need to let my principal know due to the fact that I’m in a family medical leave situation with my dad. (My 1st husband and I couldn’t afford to have kids so his parents raised our daughter).<br><br>My question is how do I tell my principal I’m pregnant? I’ve already had meetings about taking the summer off to help with my dad. I just feel like I can’t go into his office with a “Hey I’m pregnant” again. Also how do I juggle maternity leave when I’m already approved for FMLA? I don’t want to seem like I’m taking advantage of the system.