Help???

Okay so in January I gave birth to my beautiful rainbow baby boy and breastfed exclusively till about the beginning of this month. I started supplementing with formula when i noticed my supply was getting low. I've been dealing with alot of stress and I guess that's one of the causes. Anyway April 1st I got my first period since the birth and before pregnancy I had a 26/27 day cycle. Before my miscarriage in 2016 I had a strict 28 day cycle. Now since given the go ahead for sex we've used condoms since my insurance hit a rock. But on the 21st I thought since my ovulation day was a week passed that it'd be okay to not use the condom 🤷 but now I'm on cycle day 30 and still no period. Im scared and terrified that I'm pregnant again so close to my 2nd... My fiance said it's okay we'll be alright. But I'm crossing my fingers for that wicked bitch to show up cause I have a almost 5 year old and the almost 4 month old and nervous about juggling 2 under 2(1?) Please say its all in my head, cause I'm freaking out