Pregnant

So my husband and I were not trying and I have only had one period since my last baby was born. That was in February. I’d been feeling really emotional and easily agitated so I took a test and turns out I’m pregnant again. Do I call my OB since I don’t know how far along I am? How do I tell my husband? He was adamant about not wanting another baby right now and I’ve been on the pill religiously since I was 6 weeks pp. I’m freaking the freak out