Hurt on head. This. pls help nd suggest.

Actually yesterday my sister put some pressure on the left side of my head with her elbow just above the ear.And that time i felt a bit pain no vomiting no blood nothing. But there's pain since yesterday a little bit and also my uncle passed away day before yesterday so I was under stress. Like thinking all about it. And morning I woke up at 3am and didn't sleep and then I travelled also 40mins going and then 40mins coming. So today since evening I had pain from left side head from back to front. I  needed sleep v badly so I slept at 7 now when I wokeup and ate dinner. I didn't want to but then I ate. And suddenly I started getting nausea and I went and vomited. My mom said after getting hurt we shouldn't vomit. I got hurt yesterday but still. Nd I have a bit heaviness or tightness whatever on that part. And now after vomiting I feel relief. But just scared why did I vomit. I usually think a lot like this. Pls help nd suggest.