In a new relationship, been together only 3 weeks

We’ve probably only had sex about 5 times and I already feel sexually frustrated, I love going down on her and literally just spent 40 minutes doing it which she said was amazing, but then afterwards she won’t even touch me and I don’t want to straight up ask her to, any subtle suggestion I make gets ignored or turned down

This basically sums up the bedroom situation

I’ve talked to her about it and told her I was feeling frustrated but she says that she feels overwhelmed if we do it more often

Should I end things with her already? I feel like her desire for sex is only going to get worse further into the relationship