5 days late

I have copper iud but was told this wouldn’t affect my period in any way other than possibly making them longer and heavier- if it was just a day or 2 I wouldn’t be questioning

I haven’t had any symptoms like I normally would when af is about to arrive such as severe cramps, I normally get sore boobs which I do have but I would normally get this a couple of days before my period and I’ve had sore boobs for about a week and half, I had some elastic/stretchy brown discharge when I wiped

I know that the chances of me being pregnant are slim to none but if af doesn’t turn up tonight or tomorrow should I test ASAP? wait longer? or this is normal and to not test at all, af will turn up eventually?