Ok can someone help me I feel like I'm about to pass out amd weak

ok so my last period was June 24 and I thought I started my period July 21 but it was clearing pink amd last 24 hours. I kept thinking was pregnant but I would get faint positive then I start getting nothing. Well Today I started and I barely bleeding no cramps but I feel extremely faint and week I'm trying to stay awake but it's hard when I walk it takes all my strength.