Health concern

Patient: Hi. Hope you can help. I’m 27 years old and have an overactive thyroid. I have just been put on some new mess for this. I am due to start my period on Sunday but started light bleeding last Sunday. There hasn’t been a lot of blood but enough to worry me. Also, my taste buds have significantly changed lately to the point that I’m struggling to find anything that I want to eat. I just don’t feel right. Is it connected to my new meds? I’ve only just been re-diagnosed with an overactive thyroid after previously being on meds. I’m on Carbimazole. Huge thanks in advance xx