Start of labour?!

Lynsay

Having quite bad pains near the top of my bump across the top of it, feels like tightening every couple of minutes and also having period type pains lower down pretty much constantly. My whole body is over heating and I feel super sick. No signs of waters breaking or mucas plug (I don't think! had heavy discharge for a couple of days) but is this the start of labour or just baby making her way down?! I'm 38 weeks today.