advice??

so i feel like i need to vent.. me & my husband have been married 1 year this month on the 30th, we’ve honestly been trying ever since.. went to the doctor in February, he told me to go bac in July, he told me to take prenatal vitamins, I did. Went back in August cause he told me to go wen i was menstruating, he then prescribed me LETROZOLE for 5 days. I took them, as of right now im abt 5 days late for my period but i’ve taken 4 pregnancy tests & all came out negative.. my period is always on time 🤔 but i have been feeling a lil sick, nauseous but not throwing up & lazy 😩😩 kinda emotional too 😕 can i have negatives & still be pregnant? btw i have an appointment this Friday, should i go earlier than that or should i just wait? im feeling anxious cause im pretty sure theyre guna do blood tests.. lol