Pregnant with #3

I have a 3.5 year old and an 11 month old and got a blazing line on a pregnancy test today. I’m in complete shock. We didn’t even have sex during my fertile week, but we did right before. I haven’t even told my fiancé yet because he’s at work and I’m terrified. Neither of us planned on having another, not to mention things have been so stressful since having our second. I’m 38, I’m terrified something will be wrong with the baby. We’ve already outgrown our house and the market and interest rates are horrible. We can’t fit 3 car seats in our truck or car. I just don’t know what we’re going to do. I feel bad being so upset but I’m just scared of so much right now. I’ve also heard going 2-3 is harder than 1-2 and we struggled. I’m still struggling with work/family balance. Please tell me I’m not alone 😢