Spotting 5 days 1 week before my period. Now 11 days delayed, have symptoms of fuller sore breast, lower backache. Pregnancy test negative. Still pregnant?

When in doubt. just check pregnancy test. And if you are still not bleeding normally and first pregnancy test was negative, check it again in 1 week. Your symptoms certainly sound like pregnancy. See a healthcare provider for more definitive pregnancy tests if you are concerned and your tests at home are negative repeatedly.