Confused

Can someone please share their thoughts about this. I have irregular periods so my last cycle was 45 days long. First glow said I ovulated on 14 March then I put cycle length of 45 days which makes my ovulation 30th March.( note I have had sex onwards from 3rd to 16th regularly to ttc) I had brownish stuff that looks like discharge or even old blood only when I wipe . Nothing on panty on the 27th March late night . It went then yesterday I wiped their was littlest amount . I had my last period on 27th feb. thinking I’m ovulating 30th March I had sex anyway . I don’t feel any symptom other then nauseous and tired. Also I did first response on 25th which was negative.