Could spotting after protected sex indicate pregnancy for hypothyroid patients?

It is impossible to know whether the bleeding occurred because of premenstrual spotting or implantation blood without a physical examination. To get a clear idea, plz visist a gynecologist

It's important to prioritize the health and safety first and so i recommend you to consult your gynec for your particular case. 

Pregnancy symptoms normally do not appear until a few weeks after unprotected sex. Nevertheless, if you are experiencing some stress, you might want to take a pregnancy test around 3 weeks after the sex. 

Variant reasons can come up with missing menstruation, like stress, fluctuations in weight, or hormonal deficiencies that cause it. If you haven't had your period, try to watch for other symptoms that may have come along with it, such as headaches or mood swings. If you worry, it's better to go and talk to someone you feel secure with, such as a parent or school nurse, who can then show you what to do to be of better help to yourself.

I would recommend that you see an obstetrician right away. Slow fetal growth may signal a potential miscarriage or ectopic pregnancy. Tests and ultrasounds can be run by an obstetrician in order to find the core of this problem. Thus, it is crucial to seek help from an expert obstetrician who can provide the correct diagnosis and treatment.

Check for any changes in your baby's fetal movements, becuase it can decrease its oxygen supply. Contact your gynecologist immediately.