talking to GP would probably be your best bet. or there are a few threads here, though they tend to focuss on the contraceptive angle.
but, from my experiences - big plus of the pill is that you can 'skip' periods by running packs together, which is what i had to do for my A levels.. certain brands you skip often, so only have ~3 periods a year i think - but there are obvious downsides to this in terms of knowing if you're pregnant etc. so i think generally the advise not to run more than 2/3 normal packs together in a row.
but the other major bonus that seems to be noted is that periods often become much lighter - well, they're not exactly 'periods' anymore, but more withdrawal/breakthrough bleeds. so often might be shorter/lighter/much more pain free!
as with any drugs, especially hormones - there are potential side effects. the major issues i think are if you smoke/high blood pressure/history of heart problems/stroke because the pill may slightly increase the risk of blood clotting. but it has some protective effects to e.g. ovarian cancer.
more commonly noted side effects - weight fluctuation. especially on bust..
but there are plenty of brands out there - combined pill/mini pill etc. so your GP should be able to have some suggestions if you asked.
hope this helps. (& just to say not wearing a 'medic hat' here really - we haven't done much Repro, this is just from my experience.
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edit - lots of great minds answering here.. sorry for repetition!