I'm frustrated. Help 😩

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Ugh. So AF is late. She was suppose to be here Sunday but didn't show and is still a no show. I took a test on Friday before AF was suppose to come and it was a BFN. I was so devastated. I was so sure this was our month. I cried and cried lol. Now I'm late. I haven't tested again yet because I'm scared of getting another BFN. I kind of think maybe my body doesn't produce the HCG hormone right away. With my daughter I took a test the day AF was suppose to come and got a BFN. I waited 4 days to retest and got a BFP. So I'm wondering if this is the same case. I just am scared to test because if the test comes back negative than why is AF late??😩😭. I been feeling weird and have little baby cramps but not intense. My boobs are so sore, heavy, they look so full and nipples seem to be getting dark (sorry for TMI). I know there is something going on down there or going on with my body I just don't know what!?!? Is it AF or am I pregnant. Help! Sorry for the rant.