Period worries

Hi All, apologies if this has been posted previously just needing some advice.

my cycle is anywhere between 28/32 days and periods last around 5 days. This month was no different I had my usual period lasting 5 days but then 3 weeks later around day 24 I started  spotting which became heavy like a period and after 6 days is slower but still  there. sorry to overshare here but my periods are quite heavy day 2-3 but this was flooding with some large clots present which has slowed but still small clots. I have googled (yes I know) and all I'm getting back is that it could be implantation bleeding/miscarriage etc. I've not yet done a test as my period was only due to start on 3/2/17 so unsure as to when I can test just to rule those things out. I have had major stress this month also and recently lost over 2st in the last 5 months or so. I realise I must sound like an idiot but any help would  greatly appreciated. Oh I'm not ttc however also not currently on any contraceptives.