ttc am i pregnant!?

this month has been full of us trying a few times a week. After the first day of trying i have had a stomach ache. We thought welp maybe we are pregnant. So finally we tested and nope said not pregnant.... bummed we figured it was okay bc the glow app said we had a 2.5% chance anyway....So we continued to try and keep our hopes high! Well my period was due the 19th.....and still no period I have never missed my period ever!! so the 20th we tested again not pregnant..... but still i haven't started no cramps......what do i do? please let me know of some ideas or what we should do or try next. Thanks in advance two really excited future parents! 🤗👶👶