AF 5 days late

My friend thinks my hcg levels are low because last month I had 2 faint positives and 5 days late. Now I was 4 days late and just started to spot. My mom had a couple periods with me in her. My friend had 1 when she was pregnant with her third, she has 4 kids. Her friend had one every month and had hcg issues. Should I listen to my friend and get a blood test? Or should I just continue my normal life?