Very soft, 3b mixed hair - WONT CURL. OC?

Hiya everyone! 
My hair is very very soft in texture, it loses curl easily so I have to do a lot to make sure the curls stay well defined throughout the drying process.
But looking back at pictures for 2 years ago, my hair is so much more wavy now. Not even ringlets!
I've just done a big chop for BSL to just above my shoulders (both when straight) and the same is happening so I know it's not heat damage, also havent' dyed my hair for 5 years.
Is my hair too over conditioned? If so, I am worried to start using coconut oil again as a PT because I only realised about 6 months ago using it daily was breaking my hair off and I learned people use it for a PT.
I find it so hard to get the balance right because moisture, elasticity and protein and brittleness!
Any tips and products would be sosososososoososos helpful!!!
Also I am from the UK, we don't have many products over here for curly hair but we do have some shea moisture!
Thanks for any help, sorry it is long!
Sydelle :icescream:

My hair is very very soft in texture, it loses curl easily so I have to do a lot to make sure the curls stay well defined throughout the drying process.
But looking back at pictures for 2 years ago, my hair is so much more wavy now. Not even ringlets!
I've just done a big chop for BSL to just above my shoulders (both when straight) and the same is happening so I know it's not heat damage, also havent' dyed my hair for 5 years.
Is my hair too over conditioned? If so, I am worried to start using coconut oil again as a PT because I only realised about 6 months ago using it daily was breaking my hair off and I learned people use it for a PT.
I find it so hard to get the balance right because moisture, elasticity and protein and brittleness!
Any tips and products would be sosososososoososos helpful!!!
Also I am from the UK, we don't have many products over here for curly hair but we do have some shea moisture!
Thanks for any help, sorry it is long!
Sydelle :icescream:
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Comments
3A/f/i
Super baby fine hair, low porosity
Shampoos: SM Fruit Fusion (mostly), Avalon lemon (to clarify). Occasional aloe vera and glycerin to wash.
Stylers: Intelligent Nutrients Perfect Hold Hairspray
Treatments: Catnip tea, IA girl's PT, Fermented Rice Water, Catnip Tea, Amla tea, Irish Moss, SS PT
Regarding protein you can use something light to start with, something commercial, not necessarily coconut oil if it doesn't agree with your hair. I don't think it has protein but for some people it acts like protein, so I'm not sure if it would benefit you anyway. Or you can use a very dilute DIY gelatin treatment.
Co-wash: DevaCurl No Poo Decadence, AIA Long and Luxe Cowash
Leave-in: KCKT, Soultanicals Knot Sauce
Stylers: UFDCM, WLXG
SL - APL - BSL - MBL - WL - TBL