When did You Switch from Oral E to Injections?

So I’m almost a couple weeks in from starting HRT. I have a follow up appointment next month, at which point I’d like to switch to injections.

My doctor seemed up for it and stated we could possibly go that route after this first 4 weeks.

I’m currently on 3mg E sublingual and 100mg Spiro daily. I guess my question is.. is this too soon to switch to injections?

Not sure there is a specific waiting period so figure I’d ask the pros!

Any help is appreciated 💕