Hi there, I am Dr. Deepak, I work in Emergency Department, where I see many patients with injury to their head. As you mentioned you had injured your head pretty hard on saturday, there was a small cut and bit was blood came out. There is a large lump on your head, with squishy fluid on top of thump. I feel you had sustained minor injury to your head, I can say that as 1. you didn t had any dizzy feeling. 2. You didn t had vomiting even though you had nausea. 3. You didn t loose consciousness. 4. You are not feeling any numbness or weakness of any one side of your body 5. You are not having any blueish discoloration around your eyes and behind the ear 6. You are not having any trouble with walking. And the most important thing is you are pretty much okay right now, except for the pain. I would recommend you to apply some antiseptic ointment on the gash, and followed by ice pack application. You can take some pain killer for the pain as it might take some time for it to come down(3-5 days). Thank you Hope your concern was dealt with and hope you have a speedy recovery.