Idk what's up with my body

Ok so I have always had a normal cycle before and after having my son. But the last 2 months have been crazy. Last month my cycle was very lighy, totally not normal. Then this month it was 4 days late, tested, not prego. Then a couple days later I thought I started, was med/heavy for 1.5 days then just spotting again...... my normal is 5 to 6 days mostly heavy then done....I have a doc apt but not til the 30th of this month. A friend said to watch my body's signs, maybe a tubal pregnancy......