Implantation bleeding?

So i’ve been on birth control for a while and I was supposed to get my period last week. On Thursday, I only had clearish brown discharge which turned into brown discharge or spotting. Sunday I started bleeding heavily(like a regular period) then it stopped and started back on Monday then more brown. Does this sound like implantation bleeding or could it just be my birth control throwing me off. Btw I’ve had period cramps not tingling or shocking pains. Opinions?