I have a 4 month old. Been having pretty normal cycles. I had my period on feb 4 and got off feb 10. Me and my husband had unprotected sex on the 12 of feb.he did pull out. Are the chances of me being pregnant high. On the 18 of feb I had a little bit of blood and cervical mucous when I whipped. What could be going on.

I am three months late My husband and I just had our daughter who is now 6 months old she was born on August ever since I had her I have been regular with my period. On November 15 I notice I did not get a period so I went to take a home pregnancy test and it came up positive but when I went to the doctor that same week it came up negative. So I waited three months later no period every symptom of pregnancy. Yesterday Feb 20th I went to the doctor took a urine test and it showed positive but when they took a blood test to test that same day to check my hcg in my hormones it showed up negative. What is going on with me.