A truck hit you while merging into your lane?

If you are in a lane, you own it. You are not required by law to accept anybody into your lane, no matter what. It is their job to find an opening, and merge safely. That's what's tough about getting on the freeway, or merging when a lane ends. You need to wait until somebody lets you in. If they honk at you because they thought you should have let them in, they should learn how to merge. It is a kind gesture if you slow and let them in, but you do not have to! So, you are in the right. They should yield the right of way to you.