Help please!

I’m a ftm and I started my birth control after my cycles went back to normal. I wasn’t having sex until I started birth control. I usually start my period on the placebo pills but I’m on the 4th one and I still don’t have my period. I don’t feel pregnant and I feel like the second time around I would notice if I was right away. is this normal to not get my period when starting birth control again after not being on it for 9 months? Or should I test? It’s scary for me to think I have a 3 month old and the possibility of being pregnant right now 😭 I would love another but I’m just adjusting to all the new baby things... it is kind of giving me anxiety. Help please :/