Possibly Baby #2

So I just had my daughter 5months ago. Me & my baby daddy are split up but I made the decision of letting him stay with us. Well we had intercourse 2times with no protection at all. He is convinced I’m pregnant & I guess wanting to work things out. But I am the only one caring for our daughter & I dont know if I could mentally handle another one. Which if I am pregnant I will figure it out but is 2 kids under 2 hard to manage? I find it hard enough to do the simple things like grocery shop with just one! I made my mistake I know but I’m worrying myself to death. He don’t even help me carry the baby car seat into a store or anything. I knew better but I didn’t do better & I’m a mess enough as is. I need some comfort from mommas with 2 young babies to ease my mind.