Help me

Has anyone ever had the lupron shots for 6 months? My last shot was in February and got my period in May, was very heavy and a lot of clots. 23days.Just had what I think is my June period. 4 days. Was mostly brown discharge. And wasn't ever even enough for a light tampon. What that my period?
If not could I be pregnant? Don't want my hopes up after being told I can't bc my one and only tube is blocked!!??