| An hsg is a test to check for tubal blockage, Hysterosalpingogram. On average, most couples with no known problems who have sex around ovulation have about a 30% chance of pregnancy in any given month.
Assuming you had an hsg due to problems conceiving, your chances may still be less. You have eliminated one possible cause of lessened fertility, but don't mention other tests. Has your partner had a sperm analysis, have you had your hormones checked, do you chart your cycle, etc.
Also, the hcg may have interfered with conception, as the test itself could damage any egg that might have been in the fallopian tube, | 
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