Hello, I Have Had 4miscarriages Within Two Years And The

Hello, i have had 4miscarriages within two years and the trend has been 5weeks two days, then i bleed, i got a positive last week and had a brown discharge so my doctor placed me on premolut injection weekly and duphaston drugs once a day, i have been having light watery brown discharge after taking the injection, i tried doing hpt today and the hcg was low because i didnt use early morning urine, i had already urinated and waited for two hours to do it again, so i guess my hcg hadnt accumulated within the space of two hours but am so worried , please can you help me