Please need some advice ๐Ÿ˜”

๐Ÿ’–๐Ÿผ๐Ÿ‘ถ๐ŸผChristina๐Ÿ‘ถ๐Ÿผ๐Ÿผ๐Ÿ’– โ€ข 24years old been with partner 6years.....little boy age 6 and little girl age 4.....trying for baby number 3 ๐Ÿ˜€๐Ÿ˜€
Today I am 18days late cycle 47...still no AF been to docs twice they did a urine test  BFN Having a few symptoms eg..slight cramping loads of white cm (sorry tmi)  Is there a chance I could be pregnant? 
Thank you