Hit my head on the kitchen cabinet door - fell back on the ground due to impact. not sure what to do as I get married this Saturday.

Yesterday I tried to grab something on the floor and hit the kitchen cabinet door while standing up. The impact was somewhat strong, I fell back on the floor immediately - but did not pass out.

Today, I woke up with a very strong headache on my forehead and threw up 3 times in the morning before eating anything.
3 or 4 hours later, my headache got slightly better and I haven't thrown up since then.

I imagine this is probably a concussion; however, I'll get married this Saturday (28th) and can't imagine celebrating with everyone without a drop of alcohol.

Any recommendations? This is eating me from the inside, folks.