12 weeks old -crying and fussing

[Yas0000]

My son is now nearly 12 weeks old and since around 3 weeks he has been prone to crying and fussing most of the day.
We initially put this down to colic.
He has made a slight improvement in that I can put him down in his bouncer for 15 minutes which allows me to go to the toilet or grab somthing to eat but soon after he fusses or cries.
I am currently breastfeeding and we put it down to hunger so I am supplementing with formula to top him up after feeds but this isn’t really helping.
When he’s in a ‘good mood’ he is very sweet, babbling away and smiling but he just has a very short fuse.
He does still have issues with gas/wind which maybe causing some of the upset?
He also fights any naps -and only really sleeps when he’s on me which is leaving me no time to get anything done.
He doesn’t currently have any way of soothing himself (no dummy or thumb sucking) other than me offering him my breast so I find that he’s attached to me very frequently which is making me resent breastfeeding.
Anyone else out there had the same experience or can offer any advice?

Sounds a lot like my boy. He ended up giving him a dummy which I swore I'd never do. It really really helped. Also a sling and going on outings with him in it twice a day. We did find out though he has a mild allergy/intolerence to some foods (via my brewstmilk) so that didn't help.

Sounds very similar to my 11 week old, from day one she has been fussy. My first was a complete dream so it was a shock to the system!
I've thought through similar options, colic, reflux etc, the doctor doesn't think it's reflux, am also breastfeeding but can't pinpoint it to me eating something that doesn't agree with her.
She does like her sleep but fights it and only sleeps laid on somebody, I can get her into a chair/moses basket but only after holding her until she is in a deep deep sleep. She does have a dummy but that doesn't last long before it's spat out.
I don't have any advice except some babies are just more hard work than others and if you have ruled out anything medical etc hopefully they will grow out of it? 🙂