i need some opinions on if it sounds like i could be pregnant!

back story: we've been trying to concieve for awhile now (almost 3 years), ive had irregular cycles (late several days, missed months) throughout this time, my typical pms symptoms (cravings, bloating, cramps,fatigue) i have constant headaches,pcos (diagnosed hut no treatments, have hypothyroidism, but the last week ive been more tired, nipple tenderness, certain smells bother me more, nausea and vomiting, increased thirst, insomnia, overly moody, dizzy (ive had some of these symptoms before but always started my cycle soon after) i dont know what to do or think!