Topical antifungal creams are usually safe in pregnancy for a short course. Using one daily for over 6 weeks, well past the usual 7 days, isn't standard practice. If the irritation keeps returning or never fully settles, it may not be a straightforward fungal infection. The skin could also now be reacting to the cream itself.
Next Steps
Please see your obstetrician or gynaecologist this week so they can examine the area and confirm what's actually causing the irritation before you continue any treatment.
Health Tips
Stop reapplying on your own meanwhile, since prolonged use on already irritated skin can sometimes make it worse.