Coloured discharge seen during the days of haidh

I have clear and also yellowish discharge on a daily basis. I may begin my period in 4/5 days. I’m getting yellowish discharge - but this is, as I said, normal for me. However, I’m also getting lower abdomen pain. Like a twinging feeling - it seems a little similar to cramps. I’m not sure if I’m supposed to count this as haidh. What usually happens to me every month is, I see brownish discharge (which is old blood, so I know for sure it is hayd) then I see regular brown/red blood. But if yellow discharge is considered blood, then what do I do in this situation? Some women go through something called ‘pre-menstrual syndrome’ a week or two before our periods. I’m not sure if the cramp like feelings are a result of this syndrome or not or even something else.