ok can anybody let me know whats going on. i had my period on jan 8th and thrn i spotted twice in…

ok can anybody let me know whats going on. i had my period on jan 8th and thrn i spotted twice in one week i have pregnancy symptoms. my boobs hurts here and there on and off i crave alot of things. im tired and very moody. but my fiancee and i are planning to have a baby. but i have two kids already but i didnt get some of these symptoms until i was 5 weeks. i have these ovulation apps and it says im 2 weeks and 5 days but every time i took a pregnancy test it was negative and im just scared to find out im not. any advice ladies