Quick question about having a late period?

Hey ladies! Quick question last month i had my menstrual cycle on the 29 and lasted for about 3 to 4 days but on the 4th day i just spotted light pinkish... Normally my menstrual cycle last about 5-7 days. I'm kinda iffy on me being pregnant it's only been a week. This app says i wont start til the 29 of this month. Do you think possibility of pregnancy? I do not remember when i started my menstrual cycle in march i think the 15th.

Can somebody give me some advice please thank you ladies!!!