A quick warning as they may be TMI here. Have been feeling out of sorts this week (headaches extreme tiredness, that sort of thing). I got my period yesterday (I think) but it has been 5 weeks since my last (my cycle is irregular but usually at least 7-8 weeks) but this time it is very painful - (not agony but it is usually virtually painfree) and extremely heavy (having to change protection every hour). In the last few hours I have passed several large clots (about the size of small walnut) (I told you it would be TMI). As far as I know I'm not pregnant, as in we aren't trying and are using protection, but this is all very unusual for me. Should I be concerned? TIA.