I don't have morning sickness yet, but when I had a delay... My period…

I don't have morning sickness yet, but when I had a delay... My period was already 5 days late and on the test strips: for 2 days of delay the two lines were faint; by the 4th day the lines looked normal and on the 5th day too. Now I have lower abdominal and lower back pain — it's mild, sometimes there, sometimes not — and my breasts have been a little tender for about 3 days.