Period was late and I can’t tell if it’s implantation bleeding or my actual period

So i’ve had my IUD for over a year. I was on the pill for two years before that. When i was on the pill my period always came on the same Tuesday of the placebo week. With the IUD it has always came 3-6 days early. Never once have a been late.

I don’t use condoms with my significant other, but we still always use the pull out method. In june I had some ovarian cysts and from February-June i had almost two periods a month.

Yesterday I slept with a tampon in since i thought i’d start the next day. Well i woke up and took it out and had a brown blood on it, but not a lot at all. I wore another tampon throughout the day and when i took it out there was nothing on it along with the tampon i wore throughout the night. I’m a little concerned about if it’s my actual period and it’s just going away because i know that happens with IUDS or if it was implantation bleeding and my period is still late (it would be five days late now)

I’m going to take a test tonight to be safe i just wanted to know if anyone else had experienced this