She fasted even though she was not sure about her ghusl following menses. Does she have to make up the fast?

No File Exists
Check below answers in case you are looking for other related questions:
If a woman fasts when she is pregnant and is bleeding
Her menses ended before Fajr and she started fasting without doing ghusl

No File Exists
Related Answers:
Her baby is 20% breastfed; can she not fast?
Taking pills to prevent period in the last ten days of Ramadaan
Her nifaas (post-partum bleeding) came back when she was fasting
If a woman fasts when she is pregnant and is bleeding
Her menses ended before Fajr and she started fasting without doing ghusl

Recommended answers for you:
Ruling on animated drawings (cartoons)
Using the birth control pill and the coil
Ruling on smoking various types of hasheesh (marijuana)
Ruling on pointing one’s feet towards the qiblah
Can she wear perfume when she goes out with her husband?