Do Brownish Discharge And Slight Pain In Lower Abdomen Indicate Pregnancy?

Ok this is whats happening. i am 23 years old i have a daughter that will be 2 in sept. and my period is was suppose to begin 4 days ago. My periods have always been irregular. I got pregnant with my daughter around Dec. 24 thru Jan.1 ... I started my march period on the 19th. and it ended on the 24th, my daughters father an i had sex on the 24th (last day of menstruation, we did not use protection and he did ejaculated in me. My April period was 5 days late and it started on the 23rd. lasted 5 days but wasn t an heavy flow. It ended on the 28th and my daughters father and i had ex that same night also unprotected and he once again ejaculated inside of me. around the 3rd of may i had some cervical discharge that was clear an stringy like, it only lasted that day. I took a pregnancy test when i noticed my period was late in April. and it came back negative. my breast have been tender an i have been sleepy, and having sharp pains in my lower back an side. i have also been urinating more then usual, and had a couple of days of feeling nauseas but never vomited, and loss of appetite. i didn t have any of these signs when i was pregnant with my daughter i didn t know i was pregnant with her till the beginning of my second trimester. Tonight i noticed when i went to the restroom i had a lift brownish discharge. And i ave also been have slight pains in my lower abdomen i am going to take a Home PT Monday is my period hast begin. What do you guys think about my chances of being pregnant again? it just confused me that i had a period last month but it was late and i have had all of these symptoms. thank you guys for your replies.