My girlfriend & had protected sex 19 days ago, she got her period but she still has a bloated stomach & it hurts her, what can be wrong with her? help

Maybe unrelated but: There are lots of reasons for abdominal discomfort ; bloating, ; not all of them are due to the gynecologic tract. Even "functional" syndromes may be present without underlying "disease." however partial sbo due to metabolic ; inflammatory conditions nearby (like an untreated infection of the urinary tract) must be considered ; addressed. Check with her doctor for examination ; treatment options.