Late on period

Ok so lady’s I’m late on my period 5 days to be exact on the 2nd day I started to spot so I’m like ok I will be starting full blown tomorrow well sadly to say that didt happen I have been spotting with a brown ish discharge sence. We have a one year old. Have been pulling out sence I had her last October. Could I be pregnant? I haven’t ever had all this happen before.... I don’t feel anything else different sometimes I will feel some cramping but nothing to bad. What dose this mean? Can I get pregnant from pre cum?