Do you think I'm pregnant?

Hi ladies, I had 35 day cycles up until August of 2016, then I went without a period for 5 months! (My periods are irregular sometimes so it was kinda a norm for me) ANYWAYS I finally got my period on January 17th, I've been having crazy symptoms (I've been pregnant before) I was using ovulation test this month (my first time) I had low and high days but no peak, I went low, high, low so I don't know, I know you still can get pregnant even if you don't get a peak. Glow said I was due to ovulate around the 8th but changed the date on several occasions? So I don't know what to think! My boob's are extremely sore and have only been that way when I was pregnant before, but I've tested and got a bfn. Do you think I'm still in it this month? Glow has changed my period dates as well so I don't know what to believe. As of now they put me on a 41 day cycle and 18 dpo. Maybe I just ovulated late? Help?