Period or heavy implantation bleeding

Patient: “I am 25 years old. We are trying for the baby since past 3 months. I have experienced 24 hours dark brown discharge with very much pain, then 12 hours with very light bleeding, then 36 hours of heavy bleeding, then again 24 hours of very light bleeding. Now i am feeling little pain in my abdomen after that bleeding period is over(not period type pain) I don’t know these were periods or implantation bleeding. Am i pregent or not? should i go for the home preg.test or this is just a period because it never happens to me that i have feeled 2-3 days pain before period.That’s why i am confused. Please help me..