Thank for asking to HCM
I appreciate your concern, looking to the history given here this could be allergic condition and nothing to rake take with the contraceptive
pill, if I would be your doctor then I would treat this with the following medicine,
1) Tab Levocetrizine 10 mg three times in day
For the constipation
just no need to take any medicine, drink more water eat fibber containing diet this will come around, hope this information helps you have nice day.