Maybe baby?!

I may be pregnant with baby #2. My first kiddo is 3 and turns 4 next year and I’m so scared! I don’t know how I will handle 2 while being a full time working mama pursuing my masters degree next year. Husbands super supportive but I feel like it’s too soon. Anyone else have a 4 year gap? How was it? Should I be as scared as I am!?