First please find out the cause for gap recently,
1. It might be due to deposits, go for professional cleaning and then proceed with treatment plan
2. There might be caries, please take Xray and go for composite restoration or RCT, whichever needed depending on your condition
3. Due to frenum extension, check for it, if so frenectomy followed by appliances
Next Steps
Please visit Dentist and check for the actual cause.
Health Tips
Options for filling the gaps other than braces are
1.clear aligners ( invisible) , and it's best for closing small gaps ( but expensive)
2. Composite restoration
3. Veneers
4. Crowns
5. Lingual braces( will not be shown out)
please resolve the cause and then go for treatment plan
Hope this helps you