What are the risks associated with increased platelet count as a result of consuming birth control/contraceptive pills?

It may be helpful if we explore some of the causes for this intermittent bleeding - sometimes termed as "breakthrough bleeding". If the pill is not taken on a daily/regular basis, the temporary drop in the level of hormones can lead to intermittent bleeding. If you are on any long term medication (eg some antibiotics or anti-epilepsy medication) that increases hormonal metabolism/ breakdown, this can lead to a lowered level of the contraceptive hormone and this can also lead to bleeding.

I suggest to have a scan done by your gynae to check the lining of the endometrium. It is not uncommon after prolonged use that the lining thins out by quite a bit so there is nothing much to shed as a “period” as such after cessation of the pills. This situation is generally temporary, and the periods should come back soon. A second possibility is that you naturally had infrequent cycles (say every 3-4 months) due to irregular ovulation. The pill will mask this and make it seem like your periods come every month.