Does blood pressure medication cause irregular periods.?

I am currently on Amlodipine Besylate 5mg and Hydrochlorothiazide Triameterene 37.5-25mg. I take both these pills together everyday (instructed by my doctor). I have been on these pills for two months now (since December 2018) and every since then I have been spotting and having blood clots before during and after my period. Some days the spotting is light brown, other days it’s dark brown and sometimes it’s bright red and with blood clots. Before this medication my periods were fine. I’m a 29 year old female. The medication is working my blood pressure is normal range (128/80) I just don’t like this spotting. I told my doctor this and she told me to come back in three months which will be next month.