Hopeful

Hi ladies, I’ve been trying to conceive for a few months now. No luck. I feel like this is really my month though. I’m 5DPO according to glow but 4 according to the flo app. AF is supposed to arrive in 10 days, Today I woke up with major stomach pain, no fever though. I feel weak and SO tired. Like I’m exhausted. Could this be early signs??? Or way too early ??? Thanks :)