My last period was early June it lasted 3 days and I spotted for 3. But were very light. I didn't have a period in July and took a home test yesterday and it came out negative. In July I did have some pelvic cramping but that was all. And I've been feeling hot all the time and tired. The tiredness could be due to the fact I work overnights but I end up sleeping like 10 hours and still feeling tired. Not sure if it's nothing. Should I get a blood test?