😕 advice please

I started my period 5 days ago the first day it was heavy but not too bad by the next afternoon they had vanished completely..For the next two days I have had really light bleeding that's turned to brown...We have been ttc for 6 months and I haven't been feeling the best...My partner keeps saying that if I'm not pregnant I could have had a miscarriage as I have been having stomach ache & wanting to be sick ..I'm so confused coz I just thought maybe my period was acting up this month 😕