Please Help me

last year i did a hormonal treatment with medroxyprogesterone for 4 months with Farlutar, the reason i think was my endometrium in the luteal phase was very thin and in addition i had delays in alternate cycles. after that treatment my cycle returned to normal but i don't know if my endometrium is developing well. now for months i have had a regular cycle of 28/29 days with a luteal phase of 13/14 days. today i am at 11 dpo and my bbt measures 36.78 but the test is still negative. i started measuring my bbt late because my thermometer arrived late. what do you advise me to do? has anyone ever been in my