Can I get pregnant from little to none sperm?

My husband and I started trying to conceive this month.

We had sex several times over a few days before the fertile window started.

Now that I'm actually fertile, we did it again, but my husband said he finished, but that he didn't feel a lot of sperm coming out. Maybe a drop or not even that. And indeed when I stood up  nothing leaked out.

Is there still a chance I get pregnant from this? Or should I wait for next month and then not have sex before the fertile window so he will cum a lot more?