I have an 11 month old daughter and I had to stop breastfeeding at 2 1/2 months and I noticed yesterday I'm leaking colostrum. I got it very early with my daughter (6 weeks) and I didn't find out I was pregnant till 8 weeks. I took a pregnancy test yesterday and it said negative, but I took 4 with my daughter that all said negative. Is this normal? Or what should I do?

It can be... many women will find they leak or can express a bit of breastmilk months, and sometimes years after giving birth.

If may just be a one off... sometimes it happens around the time of a period as well. If it continues, you may want to have it checked... can also be due to increased hormone levels.
Obviously, keep a watch for possible signs of pregnancy as well and test again if need be.