Talk to Gynecologist on Implantation Bleeding Or Periods

"My period date was October 11, and on the same day, I experienced bleeding. However, it wasn't like my usual periods; the blood was bright red and only lasted for 5 to 6 hours, after which it completely stopped. During this time, I had severe cramps, which felt normal because I usually have them during my periods. Then, on October 14, I had brownish spotting, so I got a blood test done, but it came back negative. The next day, on October 15, I noticed pinkish-red stains on my white trousers. Since the date of my period, October 11, I have been experiencing cramps, which sometimes are mild and sometimes severe, but they go away on their own without any medication.

Now I want to ask whether this was my period or implantation bleeding, and why my cramps haven't stopped. Should I take another urine test in a few days or not?"