I need advice !!! help

So my husband and I are trying for baby #2 we have a 16 month old daughter.. Well normally my cycle is at the end of the month like the 29th or so..well instated bleeding the 23rd and it wasn't heavy and lasted till the morning of the 25th ...well ever since then I habe been feeling like i have the flu ..throwing up headaches - nauseous - missy swings bloating cramping...so I took a test and it was negative..but here we are about to be the first and no period and still feel like am I crazy could I be pregnant and it just be too early ??? I don't wanna keep wasting prego tests . ..ugh someone please tell me they have been thru this 😓