I'm not an expert on Pcos - but having cysts does cause sore boobs.
I have had a number of endometriomas - (blood filled cysts from endo) and when these are substantial and on the verge of bursting that's when I get the sore boobs thing going on.
I expect it's much the same with Pcos cysts, because the hormone levels are out of whack.
Being constipated for 4 weeks is something you can and must be doing something about yourself.
Either laxatives taken orally - or also with suppositories up the bum -which, while ickier to deal with, are actually the better way to clear out constipation because they clear blockage from the blocked end.
I find using glycerine suppositories the best.
Buy them and a packet of throw away gloves (available from the nappy counter in most big supermarkers).
Just wet the pellet in water and insert up the bum as far as you can...throw away the glove in a plastic bag or something. Then sit tight...and boy to I mean tight.
The pellet of glycerine tells the bowel to absorb water in to it. You will feel the urge to go in about 20 mins but don't go to the loo s this will all be water.
The longer you can hold on - aim for 40mins to an hour - the longer that water will hve to break down the impacted poop and the more will clear out of you when you do get to the loo.
Do this once a day every day for a few days till you re sure that your bowels are cleared out.
And make sure you take oral laxatives if you are taking lots of pain killers. The pain killers cause constipation.
Some ladies do just have larger ovaries than others - and one larger than the other. So I would advise you speak to your GP about other tests for PCOs to confirm the diagnosis from the scanner chap. Escpecially if up to know you have not had any signs of Pcos.
You should get referred to Gynae consultant and that is the time you should discuss your thoughts on possibly having endo.