Is there any possibility I’m pregnant?

I am 5 months pp.

I am breastfeeding.

The only day we had sex on was January 6th.

I took a test in Feb but it was negative. Also, it was an old test.

But since then, my periods have been super light and lasting maybe 3 days.

I know I’m probably not pregnant, but my spouse passed away and I really wish I was.