Is it implantation bleeding?

Puja
Due for AF on April 12th .. On 4/09 wiped and brown blood by end of day spotting.. 04/10 spotting.. Evening of 4/10.. Full on bleeding.. Needed a pad.. And looked like clots.. Could it be mucus.. Continued bleeding 4/11.. 4/12.. Don't need a pad.. Just panty liner.. But still spotting and then spotting brown 4/13 ..almost no spotting today.. But it's brown.. Breasts scratchy .. Very little nausea.. I generally have bleeding for 4 to 5 days.. This times has been weird. Took a test it was negative BFN.. Do I need to wait few days before I take the test? Have read online people having heavy implantation bleeding. Don't know what's going on? It's the brown spotting that's confusing me.. Why would I have brown spotting after 2 days of heavy bleeding.. 1st month TTC.. Anyone else experienced this?? I am being too optimistic.. I feel I am pregnant!!