Bleeding after sex post colposcopy

After my colposcopy and biopsy, I waited just shy of 4 weeks before having sex again with my partner. After sex I went to the bathroom to urinate as normal and everything was fine. In the morning I found light blood stains on my sheets and blood when I wiped. I’ve also been quite sore and it’s has been 3 days since I’ve had sex. I’m just wondering is this normal after a colposcopy? And if not what else would it be?