Should I be worried?..

Had my first ultrasound yesterday I was 7w 4d but was measuring 6w 3d, saw a little heart beat and everything was great, that afternoon I go toilet and wipe and it was browny mucus, like what happens after your periods finished? If that makes sense...

My partner and I then had sex and there was a very small amount of light red blood. Woke up this morning and there’s no blood but a little bit of the mucus every now and then... should I be worried? I had a miscarriage at 8 weeks October last year..