Bleeding after sex

Hi guys , I’m a bit worried . First thing to say is that I have some thyroid issues . I have hypothyroidism and I stopped taking my medication for 45 days and then re started because I got tested again and it was high . Anyways , today I had passionate sex with my husband at around 5 pm washed myself , peed etc and like at 9 pm I went to pee and when I cleaned myself I saw pinkish blood in the toilet paper . Any similar experiences that ended up being nothing ? My period is not due for another 2-3 weeks but I’m not sure because my cycle just went crazy this in may and I called the nurse and she told me that it was most likely because of my thyroid .