Leaking after sex

My husband and I have been TTC for 3 months now. After we have sex and he pulls out quite a bit of his semen comes out too. His semen seems to be pretty gloopy, does that make a difference? We have been propping my hips up with pillows to see if that helps but quite a bit still comes out.

Will this lessen our chances of getting pregnant?

Are there any other tips to try and avoid this happening?