Pregnant 3 months after having a baby! What do I do?!?!

So I had my sweet daughter early February and I told my husband that when she turned about 6 months I wanted to start trying again.

Well, last weekend I felt off so I took a pregnancy test and it came out positive!

I felt like it was a false positive so I took 3 more, and they all came out positive too!

So now my babies will be a year apparently!

Has anyone else had that happen to them!?!

What do I do?

Help!!