pregnancy symptoms or something else?

Not sure if this is the right place to post this... but here goes.
I have PCOS, and have recently been slowly losing weight, and my AF has been coming quite regularly (every 35 days, which is considered normal?) lol and not once every couple of months. My last one however (two weeks ago) was very light, and lasted two days.
Ever since then, I have been getting quite nauseated, and diarrhoea, light headed and extremely tired. The last week i have been getting dull aches in my bbs, that seems to last longer every day. Plenty of headaches, but i get headaches quite regularly anyway. Heartburn has been playing up too. i do have a gallbladder problem, but medication stops the heartburn from that, but its not working now. last time i was pg, the heartburn was bad and had bleeding twice before i misscarried.
I do intend to go to the doctors, but until the day of my appointment, i just want to know if anyone has experienced anything like this before? im just feeling horrible. i just want to keep napping because i feel so tired and sick all the time.