OP I'm currently 34 weeks with a clomid baby (conceived 6th cycle - really didn't think it was going to happen) Also thin PCOS.
As SirChenjin says, there's nothing anyone can say to stop you worrying...I worried until the 8 week scan, then until the 12 week scan, then until the 20 week scan..now I worry any time I don't feel baby moving for more than two minutes 
Time will go incredibly slowly until you see that first heartbeat, but you'll get there.
Exhaustion, dizziness, nausea, twinges, aches...all pretty classic symptoms of early pregnancy. If ectopic has been ruled out and
And no, I don't think your ovaries get bigger on clomid. At least I didn't hear that anywhere and, as I was scanned monthly, didn't notice any changes in size myself. However, the corpus luteum can remain in the ovary (this is true whether you have taken clomid or not) and that can cause some aches and pains.
By the way - the thing about you being more likely to miscarry on clomid - has been disproved by recent studies. Your body produced and released an egg, your partner's sperm fertilised it, it implanted. Just like any other pregnancy, except you (and I) had a bit of help with the egg bit.