Late period after chemical pregnancy

Hi. I had a chemical pregnancy last cycle (starting bleeding 4 days after faint positive). I am now almost 2 weeks late for my next cycle. Taken pregnancy tests ( 10mlu  cheapies off eBay) a few and days after missed period and then again a week later both negative. Have symptoms of pregnancy ie. Sore boobs, lower back pain, tiredness and my cervix feels high. Is it normal to have delayed periods after chemical pregnancies?