extreme anxiety

so im constantly afraid that im pregnant. im on birth control pills that i take every night on time, havent had sex at ALL this month. in fact, i havent even seen my boyfriend at all this month because of the quarantine. yet im still terrified i could somehow be pregnant. this has been going on for a while and im tired of the constant anxiety. i see a therapist but shes currently furloughed because of the virus. anything sexual makes me uncomfortable now. i dont know what to do. im suffering so much because of it and i just dont know why i constantly think im pregnant. has anybody else ever gone through this?? im well educated on sex so it doesnt make sense why i have this constant fear. im only 16 years old, ive never had a problem with sex in the past but now i get uncomfortable and so scared. i literally havent had sex in months/weeks. i just dont get it. help.