Pregnant after miscarriage no period ?

Hey, so I had a miscarriage on the 31st of January, I bled for a week. I was only 4 weeks. Took my blood test on the 16th and it was completely negative. Dr told me period should come back on 4-6 weeks. I haven’t had a period, and I’ve having pregnancy symptoms but I know pregnancy and period symptoms are the same. Has anyone got pregnant after a miscarriage with no period?